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Finding the Fourth Proportional to 80,238.34, 120,312.51 and 54,966.40

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Solution

The fourth proportional to 80,238.34, 120,312.51 and 54,966.40 is: 82,418.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,238.34 : 120,312.51 = 54,966.40 : x
  2. Step 2: Convert to fraction form
    80,238.34/120,312.51 = 54,966.40/x
  3. Step 3: Cross multiply
    80,238.34x = 120,312.51 × 54,966.40
  4. Step 4: Simplify right side
    80,238.34x = 6,613,145,549.66
  5. Step 5: Solve for x
    x = 6,613,145,549.66/80,238.34
  6. Step 6: Final answer
    x = 82,418.77

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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.