Home / 72,921.25-100,631.39-39,387.25

Finding the Fourth Proportional to 72,921.25, 100,631.39 and 39,387.25

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Solution

The fourth proportional to 72,921.25, 100,631.39 and 39,387.25 is: 54,354.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,921.25 : 100,631.39 = 39,387.25 : x
  2. Step 2: Convert to fraction form
    72,921.25/100,631.39 = 39,387.25/x
  3. Step 3: Cross multiply
    72,921.25x = 100,631.39 × 39,387.25
  4. Step 4: Simplify right side
    72,921.25x = 3,963,593,715.78
  5. Step 5: Solve for x
    x = 3,963,593,715.78/72,921.25
  6. Step 6: Final answer
    x = 54,354.44

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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.