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Finding the Fourth Proportional to 143,207.80, 215,041.20 and 113,869.60

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Solution

The fourth proportional to 143,207.80, 215,041.20 and 113,869.60 is: 170,986.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,207.80 : 215,041.20 = 113,869.60 : x
  2. Step 2: Convert to fraction form
    143,207.80/215,041.20 = 113,869.60/x
  3. Step 3: Cross multiply
    143,207.80x = 215,041.20 × 113,869.60
  4. Step 4: Simplify right side
    143,207.80x = 24,486,655,427.52
  5. Step 5: Solve for x
    x = 24,486,655,427.52/143,207.80
  6. Step 6: Final answer
    x = 170,986.88

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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.