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Finding the Fourth Proportional to 172,182.64, 258,374.52 and 72,335.60

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Solution

The fourth proportional to 172,182.64, 258,374.52 and 72,335.60 is: 108,545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,182.64 : 258,374.52 = 72,335.60 : x
  2. Step 2: Convert to fraction form
    172,182.64/258,374.52 = 72,335.60/x
  3. Step 3: Cross multiply
    172,182.64x = 258,374.52 × 72,335.60
  4. Step 4: Simplify right side
    172,182.64x = 18,689,675,928.91
  5. Step 5: Solve for x
    x = 18,689,675,928.91/172,182.64
  6. Step 6: Final answer
    x = 108,545.65

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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.