Home / 100,045.12-138,057.11-54,714.28

Finding the Fourth Proportional to 100,045.12, 138,057.11 and 54,714.28

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Solution

The fourth proportional to 100,045.12, 138,057.11 and 54,714.28 is: 75,502.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,045.12 : 138,057.11 = 54,714.28 : x
  2. Step 2: Convert to fraction form
    100,045.12/138,057.11 = 54,714.28/x
  3. Step 3: Cross multiply
    100,045.12x = 138,057.11 × 54,714.28
  4. Step 4: Simplify right side
    100,045.12x = 7,553,694,408.67
  5. Step 5: Solve for x
    x = 7,553,694,408.67/100,045.12
  6. Step 6: Final answer
    x = 75,502.88

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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.