Home / 80,047.47-120,071.20-30,138.76

Finding the Fourth Proportional to 80,047.47, 120,071.20 and 30,138.76

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Solution

The fourth proportional to 80,047.47, 120,071.20 and 30,138.76 is: 45,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,047.47 : 120,071.20 = 30,138.76 : x
  2. Step 2: Convert to fraction form
    80,047.47/120,071.20 = 30,138.76/x
  3. Step 3: Cross multiply
    80,047.47x = 120,071.20 × 30,138.76
  4. Step 4: Simplify right side
    80,047.47x = 3,618,797,079.71
  5. Step 5: Solve for x
    x = 3,618,797,079.71/80,047.47
  6. Step 6: Final answer
    x = 45,208.14

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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.