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Finding the Fourth Proportional to 138,403.60, 207,702.60 and 88,604.80

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Solution

The fourth proportional to 138,403.60, 207,702.60 and 88,604.80 is: 132,969.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.60 : 207,702.60 = 88,604.80 : x
  2. Step 2: Convert to fraction form
    138,403.60/207,702.60 = 88,604.80/x
  3. Step 3: Cross multiply
    138,403.60x = 207,702.60 × 88,604.80
  4. Step 4: Simplify right side
    138,403.60x = 18,403,447,332.48
  5. Step 5: Solve for x
    x = 18,403,447,332.48/138,403.60
  6. Step 6: Final answer
    x = 132,969.43

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1.5x scale

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.