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Finding the Fourth Proportional to 128,747.34, 193,129.65 and 44,515.71

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Solution

The fourth proportional to 128,747.34, 193,129.65 and 44,515.71 is: 66,776.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747.34 : 193,129.65 = 44,515.71 : x
  2. Step 2: Convert to fraction form
    128,747.34/193,129.65 = 44,515.71/x
  3. Step 3: Cross multiply
    128,747.34x = 193,129.65 × 44,515.71
  4. Step 4: Simplify right side
    128,747.34x = 8,597,303,491.80
  5. Step 5: Solve for x
    x = 8,597,303,491.80/128,747.34
  6. Step 6: Final answer
    x = 66,776.55

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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.