Home / 90,623.20-135,934.80-71,960.80

Finding the Fourth Proportional to 90,623.20, 135,934.80 and 71,960.80

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Solution

The fourth proportional to 90,623.20, 135,934.80 and 71,960.80 is: 107,941.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,623.20 : 135,934.80 = 71,960.80 : x
  2. Step 2: Convert to fraction form
    90,623.20/135,934.80 = 71,960.80/x
  3. Step 3: Cross multiply
    90,623.20x = 135,934.80 × 71,960.80
  4. Step 4: Simplify right side
    90,623.20x = 9,781,976,955.84
  5. Step 5: Solve for x
    x = 9,781,976,955.84/90,623.20
  6. Step 6: Final answer
    x = 107,941.20

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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.