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Finding the Fourth Proportional to 122,776.80, 169,459.20 and 80,311.20

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Solution

The fourth proportional to 122,776.80, 169,459.20 and 80,311.20 is: 110,847.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,776.80 : 169,459.20 = 80,311.20 : x
  2. Step 2: Convert to fraction form
    122,776.80/169,459.20 = 80,311.20/x
  3. Step 3: Cross multiply
    122,776.80x = 169,459.20 × 80,311.20
  4. Step 4: Simplify right side
    122,776.80x = 13,609,471,703.04
  5. Step 5: Solve for x
    x = 13,609,471,703.04/122,776.80
  6. Step 6: Final answer
    x = 110,847.26

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1.5x scale

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.