Home / 87,399.66-120,319.93-83,382.72

Finding the Fourth Proportional to 87,399.66, 120,319.93 and 83,382.72

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Solution

The fourth proportional to 87,399.66, 120,319.93 and 83,382.72 is: 114,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,399.66 : 120,319.93 = 83,382.72 : x
  2. Step 2: Convert to fraction form
    87,399.66/120,319.93 = 83,382.72/x
  3. Step 3: Cross multiply
    87,399.66x = 120,319.93 × 83,382.72
  4. Step 4: Simplify right side
    87,399.66x = 10,032,602,686.64
  5. Step 5: Solve for x
    x = 10,032,602,686.64/87,399.66
  6. Step 6: Final answer
    x = 114,789.95

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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.