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Finding the Fourth Proportional to 64,793.52, 89,431.76 and 42,188.99

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Solution

The fourth proportional to 64,793.52, 89,431.76 and 42,188.99 is: 58,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,793.52 : 89,431.76 = 42,188.99 : x
  2. Step 2: Convert to fraction form
    64,793.52/89,431.76 = 42,188.99/x
  3. Step 3: Cross multiply
    64,793.52x = 89,431.76 × 42,188.99
  4. Step 4: Simplify right side
    64,793.52x = 3,773,035,286.64
  5. Step 5: Solve for x
    x = 3,773,035,286.64/64,793.52
  6. Step 6: Final answer
    x = 58,231.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.