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Finding the Fourth Proportional to 71,316.40, 98,418 and 42,665.56

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Solution

The fourth proportional to 71,316.40, 98,418 and 42,665.56 is: 58,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,316.40 : 98,418 = 42,665.56 : x
  2. Step 2: Convert to fraction form
    71,316.40/98,418 = 42,665.56/x
  3. Step 3: Cross multiply
    71,316.40x = 98,418 × 42,665.56
  4. Step 4: Simplify right side
    71,316.40x = 4,199,059,084.08
  5. Step 5: Solve for x
    x = 4,199,059,084.08/71,316.40
  6. Step 6: Final answer
    x = 58,879.29

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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.