Home / 129,254.60-178,368.78-71,891.96

Finding the Fourth Proportional to 129,254.60, 178,368.78 and 71,891.96

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Solution

The fourth proportional to 129,254.60, 178,368.78 and 71,891.96 is: 99,209.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,254.60 : 178,368.78 = 71,891.96 : x
  2. Step 2: Convert to fraction form
    129,254.60/178,368.78 = 71,891.96/x
  3. Step 3: Cross multiply
    129,254.60x = 178,368.78 × 71,891.96
  4. Step 4: Simplify right side
    129,254.60x = 12,823,280,925.25
  5. Step 5: Solve for x
    x = 12,823,280,925.25/129,254.60
  6. Step 6: Final answer
    x = 99,209.47

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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.