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Finding the Fourth Proportional to 125,119.52, 172,649.16 and 99,690.32

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Solution

The fourth proportional to 125,119.52, 172,649.16 and 99,690.32 is: 137,560.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,119.52 : 172,649.16 = 99,690.32 : x
  2. Step 2: Convert to fraction form
    125,119.52/172,649.16 = 99,690.32/x
  3. Step 3: Cross multiply
    125,119.52x = 172,649.16 × 99,690.32
  4. Step 4: Simplify right side
    125,119.52x = 17,211,450,008.13
  5. Step 5: Solve for x
    x = 17,211,450,008.13/125,119.52
  6. Step 6: Final answer
    x = 137,560.07

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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.