Home / 78,742.13-108,702.91-54,561.40

Finding the Fourth Proportional to 78,742.13, 108,702.91 and 54,561.40

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Solution

The fourth proportional to 78,742.13, 108,702.91 and 54,561.40 is: 75,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,742.13 : 108,702.91 = 54,561.40 : x
  2. Step 2: Convert to fraction form
    78,742.13/108,702.91 = 54,561.40/x
  3. Step 3: Cross multiply
    78,742.13x = 108,702.91 × 54,561.40
  4. Step 4: Simplify right side
    78,742.13x = 5,930,982,750.12
  5. Step 5: Solve for x
    x = 5,930,982,750.12/78,742.13
  6. Step 6: Final answer
    x = 75,321.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.