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Finding the Fourth Proportional to 71,290.52, 98,378.94 and 40,662.92

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Solution

The fourth proportional to 71,290.52, 98,378.94 and 40,662.92 is: 56,113.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,290.52 : 98,378.94 = 40,662.92 : x
  2. Step 2: Convert to fraction form
    71,290.52/98,378.94 = 40,662.92/x
  3. Step 3: Cross multiply
    71,290.52x = 98,378.94 × 40,662.92
  4. Step 4: Simplify right side
    71,290.52x = 4,000,374,475.01
  5. Step 5: Solve for x
    x = 4,000,374,475.01/71,290.52
  6. Step 6: Final answer
    x = 56,113.70

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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.