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Finding the Fourth Proportional to 90,627.10, 135,940.65 and 89,314.90

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Solution

The fourth proportional to 90,627.10, 135,940.65 and 89,314.90 is: 133,972.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,627.10 : 135,940.65 = 89,314.90 : x
  2. Step 2: Convert to fraction form
    90,627.10/135,940.65 = 89,314.90/x
  3. Step 3: Cross multiply
    90,627.10x = 135,940.65 × 89,314.90
  4. Step 4: Simplify right side
    90,627.10x = 12,141,525,560.69
  5. Step 5: Solve for x
    x = 12,141,525,560.69/90,627.10
  6. Step 6: Final answer
    x = 133,972.35

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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.