Home / 129,209.16-178,323.42-71,854.20

Finding the Fourth Proportional to 129,209.16, 178,323.42 and 71,854.20

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Solution

The fourth proportional to 129,209.16, 178,323.42 and 71,854.20 is: 99,167.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,209.16 : 178,323.42 = 71,854.20 : x
  2. Step 2: Convert to fraction form
    129,209.16/178,323.42 = 71,854.20/x
  3. Step 3: Cross multiply
    129,209.16x = 178,323.42 × 71,854.20
  4. Step 4: Simplify right side
    129,209.16x = 12,813,286,685.36
  5. Step 5: Solve for x
    x = 12,813,286,685.36/129,209.16
  6. Step 6: Final answer
    x = 99,167.01

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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.