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Finding the Fourth Proportional to 90,019.60, 135,029.40 and 73,398.40

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Solution

The fourth proportional to 90,019.60, 135,029.40 and 73,398.40 is: 110,097.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,019.60 : 135,029.40 = 73,398.40 : x
  2. Step 2: Convert to fraction form
    90,019.60/135,029.40 = 73,398.40/x
  3. Step 3: Cross multiply
    90,019.60x = 135,029.40 × 73,398.40
  4. Step 4: Simplify right side
    90,019.60x = 9,910,941,912.96
  5. Step 5: Solve for x
    x = 9,910,941,912.96/90,019.60
  6. Step 6: Final answer
    x = 110,097.60

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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.