Home / 90,812.40-136,218.60-71,107.80

Finding the Fourth Proportional to 90,812.40, 136,218.60 and 71,107.80

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Solution

The fourth proportional to 90,812.40, 136,218.60 and 71,107.80 is: 106,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,812.40 : 136,218.60 = 71,107.80 : x
  2. Step 2: Convert to fraction form
    90,812.40/136,218.60 = 71,107.80/x
  3. Step 3: Cross multiply
    90,812.40x = 136,218.60 × 71,107.80
  4. Step 4: Simplify right side
    90,812.40x = 9,686,204,965.08
  5. Step 5: Solve for x
    x = 9,686,204,965.08/90,812.40
  6. Step 6: Final answer
    x = 106,661.70

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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.