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Finding the Fourth Proportional to 78,580.62, 108,366.69 and 60,647.22

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Solution

The fourth proportional to 78,580.62, 108,366.69 and 60,647.22 is: 83,635.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,580.62 : 108,366.69 = 60,647.22 : x
  2. Step 2: Convert to fraction form
    78,580.62/108,366.69 = 60,647.22/x
  3. Step 3: Cross multiply
    78,580.62x = 108,366.69 × 60,647.22
  4. Step 4: Simplify right side
    78,580.62x = 6,572,138,489.10
  5. Step 5: Solve for x
    x = 6,572,138,489.10/78,580.62
  6. Step 6: Final answer
    x = 83,635.62

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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.