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Finding the Fourth Proportional to 138,445.60, 207,765.60 and 59,616.40

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Solution

The fourth proportional to 138,445.60, 207,765.60 and 59,616.40 is: 89,466.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,445.60 : 207,765.60 = 59,616.40 : x
  2. Step 2: Convert to fraction form
    138,445.60/207,765.60 = 59,616.40/x
  3. Step 3: Cross multiply
    138,445.60x = 207,765.60 × 59,616.40
  4. Step 4: Simplify right side
    138,445.60x = 12,386,237,115.84
  5. Step 5: Solve for x
    x = 12,386,237,115.84/138,445.60
  6. Step 6: Final answer
    x = 89,466.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.