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Finding the Fourth Proportional to 90,000.80, 135,001.20 and 88,688.60

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Solution

The fourth proportional to 90,000.80, 135,001.20 and 88,688.60 is: 133,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,000.80 : 135,001.20 = 88,688.60 : x
  2. Step 2: Convert to fraction form
    90,000.80/135,001.20 = 88,688.60/x
  3. Step 3: Cross multiply
    90,000.80x = 135,001.20 × 88,688.60
  4. Step 4: Simplify right side
    90,000.80x = 11,973,067,426.32
  5. Step 5: Solve for x
    x = 11,973,067,426.32/90,000.80
  6. Step 6: Final answer
    x = 133,032.90

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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.