Home / 129,685.36-178,962.22-72,326.42

Finding the Fourth Proportional to 129,685.36, 178,962.22 and 72,326.42

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Solution

The fourth proportional to 129,685.36, 178,962.22 and 72,326.42 is: 99,808.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,685.36 : 178,962.22 = 72,326.42 : x
  2. Step 2: Convert to fraction form
    129,685.36/178,962.22 = 72,326.42/x
  3. Step 3: Cross multiply
    129,685.36x = 178,962.22 × 72,326.42
  4. Step 4: Simplify right side
    129,685.36x = 12,943,696,687.85
  5. Step 5: Solve for x
    x = 12,943,696,687.85/129,685.36
  6. Step 6: Final answer
    x = 99,808.46

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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.