Home / 90,646.20-135,969.30-71,983.80

Finding the Fourth Proportional to 90,646.20, 135,969.30 and 71,983.80

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Solution

The fourth proportional to 90,646.20, 135,969.30 and 71,983.80 is: 107,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,646.20 : 135,969.30 = 71,983.80 : x
  2. Step 2: Convert to fraction form
    90,646.20/135,969.30 = 71,983.80/x
  3. Step 3: Cross multiply
    90,646.20x = 135,969.30 × 71,983.80
  4. Step 4: Simplify right side
    90,646.20x = 9,787,586,897.34
  5. Step 5: Solve for x
    x = 9,787,586,897.34/90,646.20
  6. Step 6: Final answer
    x = 107,975.70

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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.