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Finding the Fourth Proportional to 119,760.64, 179,679.84 and 57,436

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Solution

The fourth proportional to 119,760.64, 179,679.84 and 57,436 is: 86,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,760.64 : 179,679.84 = 57,436 : x
  2. Step 2: Convert to fraction form
    119,760.64/179,679.84 = 57,436/x
  3. Step 3: Cross multiply
    119,760.64x = 179,679.84 × 57,436
  4. Step 4: Simplify right side
    119,760.64x = 10,320,091,290.24
  5. Step 5: Solve for x
    x = 10,320,091,290.24/119,760.64
  6. Step 6: Final answer
    x = 86,172.65

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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.