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Finding the Fourth Proportional to 64,972.59, 89,662.85 and 38,115.56

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Solution

The fourth proportional to 64,972.59, 89,662.85 and 38,115.56 is: 52,599.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,972.59 : 89,662.85 = 38,115.56 : x
  2. Step 2: Convert to fraction form
    64,972.59/89,662.85 = 38,115.56/x
  3. Step 3: Cross multiply
    64,972.59x = 89,662.85 × 38,115.56
  4. Step 4: Simplify right side
    64,972.59x = 3,417,549,100.05
  5. Step 5: Solve for x
    x = 3,417,549,100.05/64,972.59
  6. Step 6: Final answer
    x = 52,599.86

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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.