Home / 138,599.43-191,266.28-78,170.59

Finding the Fourth Proportional to 138,599.43, 191,266.28 and 78,170.59

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Solution

The fourth proportional to 138,599.43, 191,266.28 and 78,170.59 is: 107,874.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,599.43 : 191,266.28 = 78,170.59 : x
  2. Step 2: Convert to fraction form
    138,599.43/191,266.28 = 78,170.59/x
  3. Step 3: Cross multiply
    138,599.43x = 191,266.28 × 78,170.59
  4. Step 4: Simplify right side
    138,599.43x = 14,951,398,096.07
  5. Step 5: Solve for x
    x = 14,951,398,096.07/138,599.43
  6. Step 6: Final answer
    x = 107,874.89

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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.