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Finding the Fourth Proportional to 88,640.60, 132,960.90 and 85,141.40

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Solution

The fourth proportional to 88,640.60, 132,960.90 and 85,141.40 is: 127,712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,640.60 : 132,960.90 = 85,141.40 : x
  2. Step 2: Convert to fraction form
    88,640.60/132,960.90 = 85,141.40/x
  3. Step 3: Cross multiply
    88,640.60x = 132,960.90 × 85,141.40
  4. Step 4: Simplify right side
    88,640.60x = 11,320,477,171.26
  5. Step 5: Solve for x
    x = 11,320,477,171.26/88,640.60
  6. Step 6: Final answer
    x = 127,712.10

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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.