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Finding the Fourth Proportional to 71,104.80, 98,132.40 and 45,638.40

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Solution

The fourth proportional to 71,104.80, 98,132.40 and 45,638.40 is: 62,985.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,104.80 : 98,132.40 = 45,638.40 : x
  2. Step 2: Convert to fraction form
    71,104.80/98,132.40 = 45,638.40/x
  3. Step 3: Cross multiply
    71,104.80x = 98,132.40 × 45,638.40
  4. Step 4: Simplify right side
    71,104.80x = 4,478,605,724.16
  5. Step 5: Solve for x
    x = 4,478,605,724.16/71,104.80
  6. Step 6: Final answer
    x = 62,985.98

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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.