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Finding the Fourth Proportional to 80,564.72, 120,722.88 and 43,129.76

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Solution

The fourth proportional to 80,564.72, 120,722.88 and 43,129.76 is: 64,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,564.72 : 120,722.88 = 43,129.76 : x
  2. Step 2: Convert to fraction form
    80,564.72/120,722.88 = 43,129.76/x
  3. Step 3: Cross multiply
    80,564.72x = 120,722.88 × 43,129.76
  4. Step 4: Simplify right side
    80,564.72x = 5,206,748,840.91
  5. Step 5: Solve for x
    x = 5,206,748,840.91/80,564.72
  6. Step 6: Final answer
    x = 64,628.15

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1.5x scale

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.