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Finding the Fourth Proportional to 80,481, 120,619.74 and 70,461.20

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Solution

The fourth proportional to 80,481, 120,619.74 and 70,461.20 is: 105,602.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,481 : 120,619.74 = 70,461.20 : x
  2. Step 2: Convert to fraction form
    80,481/120,619.74 = 70,461.20/x
  3. Step 3: Cross multiply
    80,481x = 120,619.74 × 70,461.20
  4. Step 4: Simplify right side
    80,481x = 8,499,011,925.64
  5. Step 5: Solve for x
    x = 8,499,011,925.64/80,481
  6. Step 6: Final answer
    x = 105,602.71

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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.