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Finding the Fourth Proportional to 143,509.62, 215,123.89 and 53,486.42

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Solution

The fourth proportional to 143,509.62, 215,123.89 and 53,486.42 is: 80,177.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,509.62 : 215,123.89 = 53,486.42 : x
  2. Step 2: Convert to fraction form
    143,509.62/215,123.89 = 53,486.42/x
  3. Step 3: Cross multiply
    143,509.62x = 215,123.89 × 53,486.42
  4. Step 4: Simplify right side
    143,509.62x = 11,506,206,732.57
  5. Step 5: Solve for x
    x = 11,506,206,732.57/143,509.62
  6. Step 6: Final answer
    x = 80,177.25

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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.