Home / 129,702.72-178,988.86-75,976.22

Finding the Fourth Proportional to 129,702.72, 178,988.86 and 75,976.22

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Solution

The fourth proportional to 129,702.72, 178,988.86 and 75,976.22 is: 104,846.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,702.72 : 178,988.86 = 75,976.22 : x
  2. Step 2: Convert to fraction form
    129,702.72/178,988.86 = 75,976.22/x
  3. Step 3: Cross multiply
    129,702.72x = 178,988.86 × 75,976.22
  4. Step 4: Simplify right side
    129,702.72x = 13,598,897,004.91
  5. Step 5: Solve for x
    x = 13,598,897,004.91/129,702.72
  6. Step 6: Final answer
    x = 104,846.66

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1.5x scale

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.