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Finding the Fourth Proportional to 90,627.60, 135,941.40 and 89,315.40

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Solution

The fourth proportional to 90,627.60, 135,941.40 and 89,315.40 is: 133,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,627.60 : 135,941.40 = 89,315.40 : x
  2. Step 2: Convert to fraction form
    90,627.60/135,941.40 = 89,315.40/x
  3. Step 3: Cross multiply
    90,627.60x = 135,941.40 × 89,315.40
  4. Step 4: Simplify right side
    90,627.60x = 12,141,660,517.56
  5. Step 5: Solve for x
    x = 12,141,660,517.56/90,627.60
  6. Step 6: Final answer
    x = 133,973.10

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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.