Home / 81,115.19-121,686.80-36,152.52

Finding the Fourth Proportional to 81,115.19, 121,686.80 and 36,152.52

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Solution

The fourth proportional to 81,115.19, 121,686.80 and 36,152.52 is: 54,235.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,115.19 : 121,686.80 = 36,152.52 : x
  2. Step 2: Convert to fraction form
    81,115.19/121,686.80 = 36,152.52/x
  3. Step 3: Cross multiply
    81,115.19x = 121,686.80 × 36,152.52
  4. Step 4: Simplify right side
    81,115.19x = 4,399,284,289.97
  5. Step 5: Solve for x
    x = 4,399,284,289.97/81,115.19
  6. Step 6: Final answer
    x = 54,235.03

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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.