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Finding the Fourth Proportional to 172,040.70, 258,061.05 and 140,547.90

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Solution

The fourth proportional to 172,040.70, 258,061.05 and 140,547.90 is: 210,821.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,040.70 : 258,061.05 = 140,547.90 : x
  2. Step 2: Convert to fraction form
    172,040.70/258,061.05 = 140,547.90/x
  3. Step 3: Cross multiply
    172,040.70x = 258,061.05 × 140,547.90
  4. Step 4: Simplify right side
    172,040.70x = 36,269,938,649.30
  5. Step 5: Solve for x
    x = 36,269,938,649.30/172,040.70
  6. Step 6: Final answer
    x = 210,821.85

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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.