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Finding the Fourth Proportional to 39,891.20, 59,869.20 and 38,595.20

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Solution

The fourth proportional to 39,891.20, 59,869.20 and 38,595.20 is: 57,924.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.20 : 59,869.20 = 38,595.20 : x
  2. Step 2: Convert to fraction form
    39,891.20/59,869.20 = 38,595.20/x
  3. Step 3: Cross multiply
    39,891.20x = 59,869.20 × 38,595.20
  4. Step 4: Simplify right side
    39,891.20x = 2,310,663,747.84
  5. Step 5: Solve for x
    x = 2,310,663,747.84/39,891.20
  6. Step 6: Final answer
    x = 57,924.15

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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.