Home / 129,702.26-178,961.91-78,741.82

Finding the Fourth Proportional to 129,702.26, 178,961.91 and 78,741.82

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Solution

The fourth proportional to 129,702.26, 178,961.91 and 78,741.82 is: 108,647.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,702.26 : 178,961.91 = 78,741.82 : x
  2. Step 2: Convert to fraction form
    129,702.26/178,961.91 = 78,741.82/x
  3. Step 3: Cross multiply
    129,702.26x = 178,961.91 × 78,741.82
  4. Step 4: Simplify right side
    129,702.26x = 14,091,786,432.50
  5. Step 5: Solve for x
    x = 14,091,786,432.50/129,702.26
  6. Step 6: Final answer
    x = 108,647.19

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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.