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Finding the Fourth Proportional to 90,612.20, 135,659.10 and 55,620.20

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Solution

The fourth proportional to 90,612.20, 135,659.10 and 55,620.20 is: 83,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,612.20 : 135,659.10 = 55,620.20 : x
  2. Step 2: Convert to fraction form
    90,612.20/135,659.10 = 55,620.20/x
  3. Step 3: Cross multiply
    90,612.20x = 135,659.10 × 55,620.20
  4. Step 4: Simplify right side
    90,612.20x = 7,545,386,273.82
  5. Step 5: Solve for x
    x = 7,545,386,273.82/90,612.20
  6. Step 6: Final answer
    x = 83,271.20

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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.