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Finding the Fourth Proportional to 109,082.80, 163,393.80 and 90,650.80

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Solution

The fourth proportional to 109,082.80, 163,393.80 and 90,650.80 is: 135,784.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,082.80 : 163,393.80 = 90,650.80 : x
  2. Step 2: Convert to fraction form
    109,082.80/163,393.80 = 90,650.80/x
  3. Step 3: Cross multiply
    109,082.80x = 163,393.80 × 90,650.80
  4. Step 4: Simplify right side
    109,082.80x = 14,811,778,685.04
  5. Step 5: Solve for x
    x = 14,811,778,685.04/109,082.80
  6. Step 6: Final answer
    x = 135,784.73

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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.