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Finding the Fourth Proportional to 90,220.80, 135,331.20 and 37,612.80

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Solution

The fourth proportional to 90,220.80, 135,331.20 and 37,612.80 is: 56,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,220.80 : 135,331.20 = 37,612.80 : x
  2. Step 2: Convert to fraction form
    90,220.80/135,331.20 = 37,612.80/x
  3. Step 3: Cross multiply
    90,220.80x = 135,331.20 × 37,612.80
  4. Step 4: Simplify right side
    90,220.80x = 5,090,185,359.36
  5. Step 5: Solve for x
    x = 5,090,185,359.36/90,220.80
  6. Step 6: Final answer
    x = 56,419.20

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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.