Home / 129,103.22-178,223.10-86,154.18

Finding the Fourth Proportional to 129,103.22, 178,223.10 and 86,154.18

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Solution

The fourth proportional to 129,103.22, 178,223.10 and 86,154.18 is: 118,933.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,103.22 : 178,223.10 = 86,154.18 : x
  2. Step 2: Convert to fraction form
    129,103.22/178,223.10 = 86,154.18/x
  3. Step 3: Cross multiply
    129,103.22x = 178,223.10 × 86,154.18
  4. Step 4: Simplify right side
    129,103.22x = 15,354,665,037.56
  5. Step 5: Solve for x
    x = 15,354,665,037.56/129,103.22
  6. Step 6: Final answer
    x = 118,933.25

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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.