Home / 120,215,801.70-180,323,702.55-81,952,049.70

Finding the Fourth Proportional to 120,215,801.70, 180,323,702.55 and 81,952,049.70

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Solution

The fourth proportional to 120,215,801.70, 180,323,702.55 and 81,952,049.70 is: 122,928,074.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,215,801.70 : 180,323,702.55 = 81,952,049.70 : x
  2. Step 2: Convert to fraction form
    120,215,801.70/180,323,702.55 = 81,952,049.70/x
  3. Step 3: Cross multiply
    120,215,801.70x = 180,323,702.55 × 81,952,049.70
  4. Step 4: Simplify right side
    120,215,801.70x = 14,777,897,033,465,618
  5. Step 5: Solve for x
    x = 14,777,897,033,465,618/120,215,801.70
  6. Step 6: Final answer
    x = 122,928,074.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.