Home / 91,445.70-126,125.28-78,719.79

Finding the Fourth Proportional to 91,445.70, 126,125.28 and 78,719.79

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Solution

The fourth proportional to 91,445.70, 126,125.28 and 78,719.79 is: 108,573.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,445.70 : 126,125.28 = 78,719.79 : x
  2. Step 2: Convert to fraction form
    91,445.70/126,125.28 = 78,719.79/x
  3. Step 3: Cross multiply
    91,445.70x = 126,125.28 × 78,719.79
  4. Step 4: Simplify right side
    91,445.70x = 9,928,555,555.29
  5. Step 5: Solve for x
    x = 9,928,555,555.29/91,445.70
  6. Step 6: Final answer
    x = 108,573.24

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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.