Home / 143,640.30-215,460.45-129,862.20

Finding the Fourth Proportional to 143,640.30, 215,460.45 and 129,862.20

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Solution

The fourth proportional to 143,640.30, 215,460.45 and 129,862.20 is: 194,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,640.30 : 215,460.45 = 129,862.20 : x
  2. Step 2: Convert to fraction form
    143,640.30/215,460.45 = 129,862.20/x
  3. Step 3: Cross multiply
    143,640.30x = 215,460.45 × 129,862.20
  4. Step 4: Simplify right side
    143,640.30x = 27,980,168,049.99
  5. Step 5: Solve for x
    x = 27,980,168,049.99/143,640.30
  6. Step 6: Final answer
    x = 194,793.30

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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.