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Finding the Fourth Proportional to 71,386.30, 107,079.45 and 36,394.30

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Solution

The fourth proportional to 71,386.30, 107,079.45 and 36,394.30 is: 54,591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.30 : 107,079.45 = 36,394.30 : x
  2. Step 2: Convert to fraction form
    71,386.30/107,079.45 = 36,394.30/x
  3. Step 3: Cross multiply
    71,386.30x = 107,079.45 × 36,394.30
  4. Step 4: Simplify right side
    71,386.30x = 3,897,081,627.14
  5. Step 5: Solve for x
    x = 3,897,081,627.14/71,386.30
  6. Step 6: Final answer
    x = 54,591.45

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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.