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Finding the Fourth Proportional to 143,298.30, 214,947.45 and 129,520.20

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Solution

The fourth proportional to 143,298.30, 214,947.45 and 129,520.20 is: 194,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,298.30 : 214,947.45 = 129,520.20 : x
  2. Step 2: Convert to fraction form
    143,298.30/214,947.45 = 129,520.20/x
  3. Step 3: Cross multiply
    143,298.30x = 214,947.45 × 129,520.20
  4. Step 4: Simplify right side
    143,298.30x = 27,840,036,713.49
  5. Step 5: Solve for x
    x = 27,840,036,713.49/143,298.30
  6. Step 6: Final answer
    x = 194,280.30

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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.