Home / 129,449.40-178,695.36-87,032.64

Finding the Fourth Proportional to 129,449.40, 178,695.36 and 87,032.64

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Solution

The fourth proportional to 129,449.40, 178,695.36 and 87,032.64 is: 120,142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,449.40 : 178,695.36 = 87,032.64 : x
  2. Step 2: Convert to fraction form
    129,449.40/178,695.36 = 87,032.64/x
  3. Step 3: Cross multiply
    129,449.40x = 178,695.36 × 87,032.64
  4. Step 4: Simplify right side
    129,449.40x = 15,552,328,936.55
  5. Step 5: Solve for x
    x = 15,552,328,936.55/129,449.40
  6. Step 6: Final answer
    x = 120,142.15

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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.