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Finding the Fourth Proportional to 125,081.28, 172,612.22 and 67,720.59

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Solution

The fourth proportional to 125,081.28, 172,612.22 and 67,720.59 is: 93,454.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,081.28 : 172,612.22 = 67,720.59 : x
  2. Step 2: Convert to fraction form
    125,081.28/172,612.22 = 67,720.59/x
  3. Step 3: Cross multiply
    125,081.28x = 172,612.22 × 67,720.59
  4. Step 4: Simplify right side
    125,081.28x = 11,689,401,041.01
  5. Step 5: Solve for x
    x = 11,689,401,041.01/125,081.28
  6. Step 6: Final answer
    x = 93,454.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.