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Finding the Fourth Proportional to 80,856.84, 121,210.74 and 74,214.84

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Solution

The fourth proportional to 80,856.84, 121,210.74 and 74,214.84 is: 111,253.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,856.84 : 121,210.74 = 74,214.84 : x
  2. Step 2: Convert to fraction form
    80,856.84/121,210.74 = 74,214.84/x
  3. Step 3: Cross multiply
    80,856.84x = 121,210.74 × 74,214.84
  4. Step 4: Simplify right side
    80,856.84x = 8,995,635,675.38
  5. Step 5: Solve for x
    x = 8,995,635,675.38/80,856.84
  6. Step 6: Final answer
    x = 111,253.86

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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.