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Finding the Fourth Proportional to 80,409.88, 120,634.98 and 70,320.52

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Solution

The fourth proportional to 80,409.88, 120,634.98 and 70,320.52 is: 105,498.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,409.88 : 120,634.98 = 70,320.52 : x
  2. Step 2: Convert to fraction form
    80,409.88/120,634.98 = 70,320.52/x
  3. Step 3: Cross multiply
    80,409.88x = 120,634.98 × 70,320.52
  4. Step 4: Simplify right side
    80,409.88x = 8,483,114,523.79
  5. Step 5: Solve for x
    x = 8,483,114,523.79/80,409.88
  6. Step 6: Final answer
    x = 105,498.41

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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.