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Finding the Fourth Proportional to 56,708.79, 84,964.56 and 39,805.92

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Solution

The fourth proportional to 56,708.79, 84,964.56 and 39,805.92 is: 59,639.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,708.79 : 84,964.56 = 39,805.92 : x
  2. Step 2: Convert to fraction form
    56,708.79/84,964.56 = 39,805.92/x
  3. Step 3: Cross multiply
    56,708.79x = 84,964.56 × 39,805.92
  4. Step 4: Simplify right side
    56,708.79x = 3,382,092,478.20
  5. Step 5: Solve for x
    x = 3,382,092,478.20/56,708.79
  6. Step 6: Final answer
    x = 59,639.65

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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.