Home / 138,599.59-191,267.40-78,170.11

Finding the Fourth Proportional to 138,599.59, 191,267.40 and 78,170.11

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Solution

The fourth proportional to 138,599.59, 191,267.40 and 78,170.11 is: 107,874.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,599.59 : 191,267.40 = 78,170.11 : x
  2. Step 2: Convert to fraction form
    138,599.59/191,267.40 = 78,170.11/x
  3. Step 3: Cross multiply
    138,599.59x = 191,267.40 × 78,170.11
  4. Step 4: Simplify right side
    138,599.59x = 14,951,394,368.41
  5. Step 5: Solve for x
    x = 14,951,394,368.41/138,599.59
  6. Step 6: Final answer
    x = 107,874.73

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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.