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Finding the Fourth Proportional to 80,898.82, 121,402.90 and 28,308.76

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Solution

The fourth proportional to 80,898.82, 121,402.90 and 28,308.76 is: 42,482.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,898.82 : 121,402.90 = 28,308.76 : x
  2. Step 2: Convert to fraction form
    80,898.82/121,402.90 = 28,308.76/x
  3. Step 3: Cross multiply
    80,898.82x = 121,402.90 × 28,308.76
  4. Step 4: Simplify right side
    80,898.82x = 3,436,764,881.62
  5. Step 5: Solve for x
    x = 3,436,764,881.62/80,898.82
  6. Step 6: Final answer
    x = 42,482.26

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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.