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Finding the Fourth Proportional to 316,520.20, 474,763.80 and 79,864.94

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Solution

The fourth proportional to 316,520.20, 474,763.80 and 79,864.94 is: 119,793.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,520.20 : 474,763.80 = 79,864.94 : x
  2. Step 2: Convert to fraction form
    316,520.20/474,763.80 = 79,864.94/x
  3. Step 3: Cross multiply
    316,520.20x = 474,763.80 × 79,864.94
  4. Step 4: Simplify right side
    316,520.20x = 37,916,982,401.17
  5. Step 5: Solve for x
    x = 37,916,982,401.17/316,520.20
  6. Step 6: Final answer
    x = 119,793.25

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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.