Home / 129,645.84-178,910.19-72,284.46

Finding the Fourth Proportional to 129,645.84, 178,910.19 and 72,284.46

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Solution

The fourth proportional to 129,645.84, 178,910.19 and 72,284.46 is: 99,751.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,645.84 : 178,910.19 = 72,284.46 : x
  2. Step 2: Convert to fraction form
    129,645.84/178,910.19 = 72,284.46/x
  3. Step 3: Cross multiply
    129,645.84x = 178,910.19 × 72,284.46
  4. Step 4: Simplify right side
    129,645.84x = 12,932,426,472.65
  5. Step 5: Solve for x
    x = 12,932,426,472.65/129,645.84
  6. Step 6: Final answer
    x = 99,751.96

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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.