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Finding the Fourth Proportional to 58,539.81, 80,763.20 and 38,407.89

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Solution

The fourth proportional to 58,539.81, 80,763.20 and 38,407.89 is: 52,988.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,539.81 : 80,763.20 = 38,407.89 : x
  2. Step 2: Convert to fraction form
    58,539.81/80,763.20 = 38,407.89/x
  3. Step 3: Cross multiply
    58,539.81x = 80,763.20 × 38,407.89
  4. Step 4: Simplify right side
    58,539.81x = 3,101,943,909.61
  5. Step 5: Solve for x
    x = 3,101,943,909.61/58,539.81
  6. Step 6: Final answer
    x = 52,988.62

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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.