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Finding the Fourth Proportional to 78,487.44, 108,352.80 and 60,542.16

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Solution

The fourth proportional to 78,487.44, 108,352.80 and 60,542.16 is: 83,579.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,487.44 : 108,352.80 = 60,542.16 : x
  2. Step 2: Convert to fraction form
    78,487.44/108,352.80 = 60,542.16/x
  3. Step 3: Cross multiply
    78,487.44x = 108,352.80 × 60,542.16
  4. Step 4: Simplify right side
    78,487.44x = 6,559,912,554.05
  5. Step 5: Solve for x
    x = 6,559,912,554.05/78,487.44
  6. Step 6: Final answer
    x = 83,579.14

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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.