Home / 100,470.28-138,625.14-64,671.88

Finding the Fourth Proportional to 100,470.28, 138,625.14 and 64,671.88

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Solution

The fourth proportional to 100,470.28, 138,625.14 and 64,671.88 is: 89,231.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,470.28 : 138,625.14 = 64,671.88 : x
  2. Step 2: Convert to fraction form
    100,470.28/138,625.14 = 64,671.88/x
  3. Step 3: Cross multiply
    100,470.28x = 138,625.14 × 64,671.88
  4. Step 4: Simplify right side
    100,470.28x = 8,965,148,419.06
  5. Step 5: Solve for x
    x = 8,965,148,419.06/100,470.28
  6. Step 6: Final answer
    x = 89,231.84

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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.