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Finding the Fourth Proportional to 132,390.60, 198,585.90 and 90,400.20

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Solution

The fourth proportional to 132,390.60, 198,585.90 and 90,400.20 is: 135,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,390.60 : 198,585.90 = 90,400.20 : x
  2. Step 2: Convert to fraction form
    132,390.60/198,585.90 = 90,400.20/x
  3. Step 3: Cross multiply
    132,390.60x = 198,585.90 × 90,400.20
  4. Step 4: Simplify right side
    132,390.60x = 17,952,205,077.18
  5. Step 5: Solve for x
    x = 17,952,205,077.18/132,390.60
  6. Step 6: Final answer
    x = 135,600.30

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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.