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Finding the Fourth Proportional to 80,898.85, 121,402.94 and 28,308.79

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Solution

The fourth proportional to 80,898.85, 121,402.94 and 28,308.79 is: 42,482.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,898.85 : 121,402.94 = 28,308.79 : x
  2. Step 2: Convert to fraction form
    80,898.85/121,402.94 = 28,308.79/x
  3. Step 3: Cross multiply
    80,898.85x = 121,402.94 × 28,308.79
  4. Step 4: Simplify right side
    80,898.85x = 3,436,770,333.84
  5. Step 5: Solve for x
    x = 3,436,770,333.84/80,898.85
  6. Step 6: Final answer
    x = 42,482.31

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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.