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Finding the Fourth Proportional to 172,389.90, 258,001.65 and 151,394.70

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Solution

The fourth proportional to 172,389.90, 258,001.65 and 151,394.70 is: 226,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,389.90 : 258,001.65 = 151,394.70 : x
  2. Step 2: Convert to fraction form
    172,389.90/258,001.65 = 151,394.70/x
  3. Step 3: Cross multiply
    172,389.90x = 258,001.65 × 151,394.70
  4. Step 4: Simplify right side
    172,389.90x = 39,060,082,401.26
  5. Step 5: Solve for x
    x = 39,060,082,401.26/172,389.90
  6. Step 6: Final answer
    x = 226,579.88

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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.