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Finding the Fourth Proportional to 71,471.61, 98,631.54 and 39,641.04

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Solution

The fourth proportional to 71,471.61, 98,631.54 and 39,641.04 is: 54,705.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.61 : 98,631.54 = 39,641.04 : x
  2. Step 2: Convert to fraction form
    71,471.61/98,631.54 = 39,641.04/x
  3. Step 3: Cross multiply
    71,471.61x = 98,631.54 × 39,641.04
  4. Step 4: Simplify right side
    71,471.61x = 3,909,856,822.40
  5. Step 5: Solve for x
    x = 3,909,856,822.40/71,471.61
  6. Step 6: Final answer
    x = 54,705.03

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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.