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Finding the Fourth Proportional to 90,612.60, 135,844.07 and 39,975.54

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Solution

The fourth proportional to 90,612.60, 135,844.07 and 39,975.54 is: 59,930.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,612.60 : 135,844.07 = 39,975.54 : x
  2. Step 2: Convert to fraction form
    90,612.60/135,844.07 = 39,975.54/x
  3. Step 3: Cross multiply
    90,612.60x = 135,844.07 × 39,975.54
  4. Step 4: Simplify right side
    90,612.60x = 5,430,439,854.17
  5. Step 5: Solve for x
    x = 5,430,439,854.17/90,612.60
  6. Step 6: Final answer
    x = 59,930.30

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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.