Home / 72,931.13-100,645.04-39,397.13

Finding the Fourth Proportional to 72,931.13, 100,645.04 and 39,397.13

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Solution

The fourth proportional to 72,931.13, 100,645.04 and 39,397.13 is: 54,368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,931.13 : 100,645.04 = 39,397.13 : x
  2. Step 2: Convert to fraction form
    72,931.13/100,645.04 = 39,397.13/x
  3. Step 3: Cross multiply
    72,931.13x = 100,645.04 × 39,397.13
  4. Step 4: Simplify right side
    72,931.13x = 3,965,125,320.00
  5. Step 5: Solve for x
    x = 3,965,125,320.00/72,931.13
  6. Step 6: Final answer
    x = 54,368.08

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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.