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Finding the Fourth Proportional to 139,061.64, 208,644.66 and 64,217.64

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Solution

The fourth proportional to 139,061.64, 208,644.66 and 64,217.64 is: 96,350.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,061.64 : 208,644.66 = 64,217.64 : x
  2. Step 2: Convert to fraction form
    139,061.64/208,644.66 = 64,217.64/x
  3. Step 3: Cross multiply
    139,061.64x = 208,644.66 × 64,217.64
  4. Step 4: Simplify right side
    139,061.64x = 13,398,667,663.80
  5. Step 5: Solve for x
    x = 13,398,667,663.80/139,061.64
  6. Step 6: Final answer
    x = 96,350.57

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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.