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Finding the Fourth Proportional to 99,339.20, 137,138.89 and 76,627.20

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Solution

The fourth proportional to 99,339.20, 137,138.89 and 76,627.20 is: 105,784.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,339.20 : 137,138.89 = 76,627.20 : x
  2. Step 2: Convert to fraction form
    99,339.20/137,138.89 = 76,627.20/x
  3. Step 3: Cross multiply
    99,339.20x = 137,138.89 × 76,627.20
  4. Step 4: Simplify right side
    99,339.20x = 10,508,569,151.81
  5. Step 5: Solve for x
    x = 10,508,569,151.81/99,339.20
  6. Step 6: Final answer
    x = 105,784.72

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.