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Finding the Fourth Proportional to 80,681, 111,339.78 and 45,353

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Solution

The fourth proportional to 80,681, 111,339.78 and 45,353 is: 62,587.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,681 : 111,339.78 = 45,353 : x
  2. Step 2: Convert to fraction form
    80,681/111,339.78 = 45,353/x
  3. Step 3: Cross multiply
    80,681x = 111,339.78 × 45,353
  4. Step 4: Simplify right side
    80,681x = 5,049,593,042.34
  5. Step 5: Solve for x
    x = 5,049,593,042.34/80,681
  6. Step 6: Final answer
    x = 62,587.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.