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Finding the Fourth Proportional to 143,391.96, 215,034.30 and 42,159.42

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Solution

The fourth proportional to 143,391.96, 215,034.30 and 42,159.42 is: 63,223.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,391.96 : 215,034.30 = 42,159.42 : x
  2. Step 2: Convert to fraction form
    143,391.96/215,034.30 = 42,159.42/x
  3. Step 3: Cross multiply
    143,391.96x = 215,034.30 × 42,159.42
  4. Step 4: Simplify right side
    143,391.96x = 9,065,721,368.11
  5. Step 5: Solve for x
    x = 9,065,721,368.11/143,391.96
  6. Step 6: Final answer
    x = 63,223.36

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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.