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Finding the Fourth Proportional to 71,128.80, 98,160.59 and 40,914.11

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Solution

The fourth proportional to 71,128.80, 98,160.59 and 40,914.11 is: 56,463.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.80 : 98,160.59 = 40,914.11 : x
  2. Step 2: Convert to fraction form
    71,128.80/98,160.59 = 40,914.11/x
  3. Step 3: Cross multiply
    71,128.80x = 98,160.59 × 40,914.11
  4. Step 4: Simplify right side
    71,128.80x = 4,016,153,524.61
  5. Step 5: Solve for x
    x = 4,016,153,524.61/71,128.80
  6. Step 6: Final answer
    x = 56,463.11

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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.