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Finding the Fourth Proportional to 71,373.21, 98,490.78 and 39,539.81

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Solution

The fourth proportional to 71,373.21, 98,490.78 and 39,539.81 is: 54,562.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,373.21 : 98,490.78 = 39,539.81 : x
  2. Step 2: Convert to fraction form
    71,373.21/98,490.78 = 39,539.81/x
  3. Step 3: Cross multiply
    71,373.21x = 98,490.78 × 39,539.81
  4. Step 4: Simplify right side
    71,373.21x = 3,894,306,235.50
  5. Step 5: Solve for x
    x = 3,894,306,235.50/71,373.21
  6. Step 6: Final answer
    x = 54,562.58

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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.