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Finding the Fourth Proportional to 91,200.60, 136,800.90 and 89,256.60

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Solution

The fourth proportional to 91,200.60, 136,800.90 and 89,256.60 is: 133,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,200.60 : 136,800.90 = 89,256.60 : x
  2. Step 2: Convert to fraction form
    91,200.60/136,800.90 = 89,256.60/x
  3. Step 3: Cross multiply
    91,200.60x = 136,800.90 × 89,256.60
  4. Step 4: Simplify right side
    91,200.60x = 12,210,383,210.94
  5. Step 5: Solve for x
    x = 12,210,383,210.94/91,200.60
  6. Step 6: Final answer
    x = 133,884.90

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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.