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Finding the Fourth Proportional to 109,080.80, 163,390.80 and 90,648.80

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Solution

The fourth proportional to 109,080.80, 163,390.80 and 90,648.80 is: 135,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,080.80 : 163,390.80 = 90,648.80 : x
  2. Step 2: Convert to fraction form
    109,080.80/163,390.80 = 90,648.80/x
  3. Step 3: Cross multiply
    109,080.80x = 163,390.80 × 90,648.80
  4. Step 4: Simplify right side
    109,080.80x = 14,811,179,951.04
  5. Step 5: Solve for x
    x = 14,811,179,951.04/109,080.80
  6. Step 6: Final answer
    x = 135,781.73

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1.5x scale

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.