Home / 129,711.36-178,999.29-73,122.78

Finding the Fourth Proportional to 129,711.36, 178,999.29 and 73,122.78

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Solution

The fourth proportional to 129,711.36, 178,999.29 and 73,122.78 is: 100,908.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,711.36 : 178,999.29 = 73,122.78 : x
  2. Step 2: Convert to fraction form
    129,711.36/178,999.29 = 73,122.78/x
  3. Step 3: Cross multiply
    129,711.36x = 178,999.29 × 73,122.78
  4. Step 4: Simplify right side
    129,711.36x = 13,088,925,702.83
  5. Step 5: Solve for x
    x = 13,088,925,702.83/129,711.36
  6. Step 6: Final answer
    x = 100,908.09

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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.