Home / 129,486.28-193,868.16-66,170.20

Finding the Fourth Proportional to 129,486.28, 193,868.16 and 66,170.20

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Solution

The fourth proportional to 129,486.28, 193,868.16 and 66,170.20 is: 99,070.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,486.28 : 193,868.16 = 66,170.20 : x
  2. Step 2: Convert to fraction form
    129,486.28/193,868.16 = 66,170.20/x
  3. Step 3: Cross multiply
    129,486.28x = 193,868.16 × 66,170.20
  4. Step 4: Simplify right side
    129,486.28x = 12,828,294,920.83
  5. Step 5: Solve for x
    x = 12,828,294,920.83/129,486.28
  6. Step 6: Final answer
    x = 99,070.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.