Home / 129,257.22-178,254.60-83,886.72

Finding the Fourth Proportional to 129,257.22, 178,254.60 and 83,886.72

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Solution

The fourth proportional to 129,257.22, 178,254.60 and 83,886.72 is: 115,685.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,257.22 : 178,254.60 = 83,886.72 : x
  2. Step 2: Convert to fraction form
    129,257.22/178,254.60 = 83,886.72/x
  3. Step 3: Cross multiply
    129,257.22x = 178,254.60 × 83,886.72
  4. Step 4: Simplify right side
    129,257.22x = 14,953,193,718.91
  5. Step 5: Solve for x
    x = 14,953,193,718.91/129,257.22
  6. Step 6: Final answer
    x = 115,685.56

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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.