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Finding the Fourth Proportional to 109,079.80, 163,619.70 and 75,902.20

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Solution

The fourth proportional to 109,079.80, 163,619.70 and 75,902.20 is: 113,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,079.80 : 163,619.70 = 75,902.20 : x
  2. Step 2: Convert to fraction form
    109,079.80/163,619.70 = 75,902.20/x
  3. Step 3: Cross multiply
    109,079.80x = 163,619.70 × 75,902.20
  4. Step 4: Simplify right side
    109,079.80x = 12,419,095,193.34
  5. Step 5: Solve for x
    x = 12,419,095,193.34/109,079.80
  6. Step 6: Final answer
    x = 113,853.30

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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.