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Finding the Fourth Proportional to 109,292.80, 163,939.20 and 39,251.20

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Solution

The fourth proportional to 109,292.80, 163,939.20 and 39,251.20 is: 58,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,292.80 : 163,939.20 = 39,251.20 : x
  2. Step 2: Convert to fraction form
    109,292.80/163,939.20 = 39,251.20/x
  3. Step 3: Cross multiply
    109,292.80x = 163,939.20 × 39,251.20
  4. Step 4: Simplify right side
    109,292.80x = 6,434,810,327.04
  5. Step 5: Solve for x
    x = 6,434,810,327.04/109,292.80
  6. Step 6: Final answer
    x = 58,876.80

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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.