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Finding the Fourth Proportional to 148,722.89, 205,239.15 and 80,740.49

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Solution

The fourth proportional to 148,722.89, 205,239.15 and 80,740.49 is: 111,422.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,722.89 : 205,239.15 = 80,740.49 : x
  2. Step 2: Convert to fraction form
    148,722.89/205,239.15 = 80,740.49/x
  3. Step 3: Cross multiply
    148,722.89x = 205,239.15 × 80,740.49
  4. Step 4: Simplify right side
    148,722.89x = 16,571,108,511.99
  5. Step 5: Solve for x
    x = 16,571,108,511.99/148,722.89
  6. Step 6: Final answer
    x = 111,422.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.