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Finding the Fourth Proportional to 172,280.10, 258,420.15 and 125,040.90

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Solution

The fourth proportional to 172,280.10, 258,420.15 and 125,040.90 is: 187,561.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,280.10 : 258,420.15 = 125,040.90 : x
  2. Step 2: Convert to fraction form
    172,280.10/258,420.15 = 125,040.90/x
  3. Step 3: Cross multiply
    172,280.10x = 258,420.15 × 125,040.90
  4. Step 4: Simplify right side
    172,280.10x = 32,313,088,134.14
  5. Step 5: Solve for x
    x = 32,313,088,134.14/172,280.10
  6. Step 6: Final answer
    x = 187,561.35

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1.5x scale

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.