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Finding the Fourth Proportional to 64,931.60, 89,624.80 and 38,079.92

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Solution

The fourth proportional to 64,931.60, 89,624.80 and 38,079.92 is: 52,561.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,931.60 : 89,624.80 = 38,079.92 : x
  2. Step 2: Convert to fraction form
    64,931.60/89,624.80 = 38,079.92/x
  3. Step 3: Cross multiply
    64,931.60x = 89,624.80 × 38,079.92
  4. Step 4: Simplify right side
    64,931.60x = 3,412,905,214.02
  5. Step 5: Solve for x
    x = 3,412,905,214.02/64,931.60
  6. Step 6: Final answer
    x = 52,561.54

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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.