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Finding the Fourth Proportional to 172,508.60, 258,519.90 and 137,030.60

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Solution

The fourth proportional to 172,508.60, 258,519.90 and 137,030.60 is: 205,352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,508.60 : 258,519.90 = 137,030.60 : x
  2. Step 2: Convert to fraction form
    172,508.60/258,519.90 = 137,030.60/x
  3. Step 3: Cross multiply
    172,508.60x = 258,519.90 × 137,030.60
  4. Step 4: Simplify right side
    172,508.60x = 35,425,137,008.94
  5. Step 5: Solve for x
    x = 35,425,137,008.94/172,508.60
  6. Step 6: Final answer
    x = 205,352.88

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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.