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Finding the Fourth Proportional to 80,573.70, 120,812.55 and 49,431.30

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Solution

The fourth proportional to 80,573.70, 120,812.55 and 49,431.30 is: 74,117.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,573.70 : 120,812.55 = 49,431.30 : x
  2. Step 2: Convert to fraction form
    80,573.70/120,812.55 = 49,431.30/x
  3. Step 3: Cross multiply
    80,573.70x = 120,812.55 × 49,431.30
  4. Step 4: Simplify right side
    80,573.70x = 5,971,921,402.82
  5. Step 5: Solve for x
    x = 5,971,921,402.82/80,573.70
  6. Step 6: Final answer
    x = 74,117.50

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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.