Home / 100,625.28-138,864.16-55,308.20

Finding the Fourth Proportional to 100,625.28, 138,864.16 and 55,308.20

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Solution

The fourth proportional to 100,625.28, 138,864.16 and 55,308.20 is: 76,326.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,625.28 : 138,864.16 = 55,308.20 : x
  2. Step 2: Convert to fraction form
    100,625.28/138,864.16 = 55,308.20/x
  3. Step 3: Cross multiply
    100,625.28x = 138,864.16 × 55,308.20
  4. Step 4: Simplify right side
    100,625.28x = 7,680,326,734.11
  5. Step 5: Solve for x
    x = 7,680,326,734.11/100,625.28
  6. Step 6: Final answer
    x = 76,326.02

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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.