Home / 129,656.30-178,922.72-72,295.54

Finding the Fourth Proportional to 129,656.30, 178,922.72 and 72,295.54

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Solution

The fourth proportional to 129,656.30, 178,922.72 and 72,295.54 is: 99,766.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,656.30 : 178,922.72 = 72,295.54 : x
  2. Step 2: Convert to fraction form
    129,656.30/178,922.72 = 72,295.54/x
  3. Step 3: Cross multiply
    129,656.30x = 178,922.72 × 72,295.54
  4. Step 4: Simplify right side
    129,656.30x = 12,935,314,394.10
  5. Step 5: Solve for x
    x = 12,935,314,394.10/129,656.30
  6. Step 6: Final answer
    x = 99,766.19

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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.