Home / 115,201.12-158,872.10-78,955.24

Finding the Fourth Proportional to 115,201.12, 158,872.10 and 78,955.24

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Solution

The fourth proportional to 115,201.12, 158,872.10 and 78,955.24 is: 108,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,201.12 : 158,872.10 = 78,955.24 : x
  2. Step 2: Convert to fraction form
    115,201.12/158,872.10 = 78,955.24/x
  3. Step 3: Cross multiply
    115,201.12x = 158,872.10 × 78,955.24
  4. Step 4: Simplify right side
    115,201.12x = 12,543,784,784.80
  5. Step 5: Solve for x
    x = 12,543,784,784.80/115,201.12
  6. Step 6: Final answer
    x = 108,885.96

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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.