Home / 109,385.80-163,714.20-79,314.55

Finding the Fourth Proportional to 109,385.80, 163,714.20 and 79,314.55

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Solution

The fourth proportional to 109,385.80, 163,714.20 and 79,314.55 is: 118,707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,385.80 : 163,714.20 = 79,314.55 : x
  2. Step 2: Convert to fraction form
    109,385.80/163,714.20 = 79,314.55/x
  3. Step 3: Cross multiply
    109,385.80x = 163,714.20 × 79,314.55
  4. Step 4: Simplify right side
    109,385.80x = 12,984,918,101.61
  5. Step 5: Solve for x
    x = 12,984,918,101.61/109,385.80
  6. Step 6: Final answer
    x = 118,707.53

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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.