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Finding the Fourth Proportional to 172,916.20, 259,374.30 and 164,751.40

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Solution

The fourth proportional to 172,916.20, 259,374.30 and 164,751.40 is: 247,127.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,916.20 : 259,374.30 = 164,751.40 : x
  2. Step 2: Convert to fraction form
    172,916.20/259,374.30 = 164,751.40/x
  3. Step 3: Cross multiply
    172,916.20x = 259,374.30 × 164,751.40
  4. Step 4: Simplify right side
    172,916.20x = 42,732,279,049.02
  5. Step 5: Solve for x
    x = 42,732,279,049.02/172,916.20
  6. Step 6: Final answer
    x = 247,127.10

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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.