Home / 129,308.24-178,448.92-78,310.20

Finding the Fourth Proportional to 129,308.24, 178,448.92 and 78,310.20

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Solution

The fourth proportional to 129,308.24, 178,448.92 and 78,310.20 is: 108,070.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,308.24 : 178,448.92 = 78,310.20 : x
  2. Step 2: Convert to fraction form
    129,308.24/178,448.92 = 78,310.20/x
  3. Step 3: Cross multiply
    129,308.24x = 178,448.92 × 78,310.20
  4. Step 4: Simplify right side
    129,308.24x = 13,974,370,614.98
  5. Step 5: Solve for x
    x = 13,974,370,614.98/129,308.24
  6. Step 6: Final answer
    x = 108,070.23

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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.