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Finding the Fourth Proportional to 73,129.50, 100,918.71 and 39,595.50

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Solution

The fourth proportional to 73,129.50, 100,918.71 and 39,595.50 is: 54,641.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,129.50 : 100,918.71 = 39,595.50 : x
  2. Step 2: Convert to fraction form
    73,129.50/100,918.71 = 39,595.50/x
  3. Step 3: Cross multiply
    73,129.50x = 100,918.71 × 39,595.50
  4. Step 4: Simplify right side
    73,129.50x = 3,995,926,781.81
  5. Step 5: Solve for x
    x = 3,995,926,781.81/73,129.50
  6. Step 6: Final answer
    x = 54,641.79

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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.