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Finding the Fourth Proportional to 128,750.40, 193,151.52 and 44,513.76

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Solution

The fourth proportional to 128,750.40, 193,151.52 and 44,513.76 is: 66,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,750.40 : 193,151.52 = 44,513.76 : x
  2. Step 2: Convert to fraction form
    128,750.40/193,151.52 = 44,513.76/x
  3. Step 3: Cross multiply
    128,750.40x = 193,151.52 × 44,513.76
  4. Step 4: Simplify right side
    128,750.40x = 8,597,900,404.92
  5. Step 5: Solve for x
    x = 8,597,900,404.92/128,750.40
  6. Step 6: Final answer
    x = 66,779.60

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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.