Home / 72,921.52-100,631.68-39,387.52

Finding the Fourth Proportional to 72,921.52, 100,631.68 and 39,387.52

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Solution

The fourth proportional to 72,921.52, 100,631.68 and 39,387.52 is: 54,354.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,921.52 : 100,631.68 = 39,387.52 : x
  2. Step 2: Convert to fraction form
    72,921.52/100,631.68 = 39,387.52/x
  3. Step 3: Cross multiply
    72,921.52x = 100,631.68 × 39,387.52
  4. Step 4: Simplify right side
    72,921.52x = 3,963,632,308.63
  5. Step 5: Solve for x
    x = 3,963,632,308.63/72,921.52
  6. Step 6: Final answer
    x = 54,354.77

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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.