Home / 129,261.16-178,377.38-72,672.36

Finding the Fourth Proportional to 129,261.16, 178,377.38 and 72,672.36

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Solution

The fourth proportional to 129,261.16, 178,377.38 and 72,672.36 is: 100,286.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,261.16 : 178,377.38 = 72,672.36 : x
  2. Step 2: Convert to fraction form
    129,261.16/178,377.38 = 72,672.36/x
  3. Step 3: Cross multiply
    129,261.16x = 178,377.38 × 72,672.36
  4. Step 4: Simplify right side
    129,261.16x = 12,963,105,175.22
  5. Step 5: Solve for x
    x = 12,963,105,175.22/129,261.16
  6. Step 6: Final answer
    x = 100,286.16

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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.