Home / 129,726.40-194,663.42-85,374.04

Finding the Fourth Proportional to 129,726.40, 194,663.42 and 85,374.04

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Solution

The fourth proportional to 129,726.40, 194,663.42 and 85,374.04 is: 128,109.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,726.40 : 194,663.42 = 85,374.04 : x
  2. Step 2: Convert to fraction form
    129,726.40/194,663.42 = 85,374.04/x
  3. Step 3: Cross multiply
    129,726.40x = 194,663.42 × 85,374.04
  4. Step 4: Simplify right side
    129,726.40x = 16,619,202,924.73
  5. Step 5: Solve for x
    x = 16,619,202,924.73/129,726.40
  6. Step 6: Final answer
    x = 128,109.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.