Home / 90,601.20-135,772.20-66,722.40

Finding the Fourth Proportional to 90,601.20, 135,772.20 and 66,722.40

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Solution

The fourth proportional to 90,601.20, 135,772.20 and 66,722.40 is: 99,988.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,601.20 : 135,772.20 = 66,722.40 : x
  2. Step 2: Convert to fraction form
    90,601.20/135,772.20 = 66,722.40/x
  3. Step 3: Cross multiply
    90,601.20x = 135,772.20 × 66,722.40
  4. Step 4: Simplify right side
    90,601.20x = 9,059,047,037.28
  5. Step 5: Solve for x
    x = 9,059,047,037.28/90,601.20
  6. Step 6: Final answer
    x = 99,988.16

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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.