Home / 80,897.40-121,346.10-78,175.80

Finding the Fourth Proportional to 80,897.40, 121,346.10 and 78,175.80

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Solution

The fourth proportional to 80,897.40, 121,346.10 and 78,175.80 is: 117,263.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,897.40 : 121,346.10 = 78,175.80 : x
  2. Step 2: Convert to fraction form
    80,897.40/121,346.10 = 78,175.80/x
  3. Step 3: Cross multiply
    80,897.40x = 121,346.10 × 78,175.80
  4. Step 4: Simplify right side
    80,897.40x = 9,486,328,444.38
  5. Step 5: Solve for x
    x = 9,486,328,444.38/80,897.40
  6. Step 6: Final answer
    x = 117,263.70

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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.