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Finding the Fourth Proportional to 80,470.52, 120,692.04 and 21,312.20

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Solution

The fourth proportional to 80,470.52, 120,692.04 and 21,312.20 is: 31,964.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,470.52 : 120,692.04 = 21,312.20 : x
  2. Step 2: Convert to fraction form
    80,470.52/120,692.04 = 21,312.20/x
  3. Step 3: Cross multiply
    80,470.52x = 120,692.04 × 21,312.20
  4. Step 4: Simplify right side
    80,470.52x = 2,572,212,894.89
  5. Step 5: Solve for x
    x = 2,572,212,894.89/80,470.52
  6. Step 6: Final answer
    x = 31,964.66

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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.