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Finding the Fourth Proportional to 115,158.42, 172,743.78 and 36,278.82

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Solution

The fourth proportional to 115,158.42, 172,743.78 and 36,278.82 is: 54,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,158.42 : 172,743.78 = 36,278.82 : x
  2. Step 2: Convert to fraction form
    115,158.42/172,743.78 = 36,278.82/x
  3. Step 3: Cross multiply
    115,158.42x = 172,743.78 × 36,278.82
  4. Step 4: Simplify right side
    115,158.42x = 6,266,940,500.74
  5. Step 5: Solve for x
    x = 6,266,940,500.74/115,158.42
  6. Step 6: Final answer
    x = 54,420.17

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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.