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Finding the Fourth Proportional to 89,833.60, 134,827.20 and 39,990.40

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Solution

The fourth proportional to 89,833.60, 134,827.20 and 39,990.40 is: 60,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,833.60 : 134,827.20 = 39,990.40 : x
  2. Step 2: Convert to fraction form
    89,833.60/134,827.20 = 39,990.40/x
  3. Step 3: Cross multiply
    89,833.60x = 134,827.20 × 39,990.40
  4. Step 4: Simplify right side
    89,833.60x = 5,391,793,658.88
  5. Step 5: Solve for x
    x = 5,391,793,658.88/89,833.60
  6. Step 6: Final answer
    x = 60,019.79

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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.