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Finding the Fourth Proportional to 81,168.60, 121,752.90 and 81,168.60

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Solution

The fourth proportional to 81,168.60, 121,752.90 and 81,168.60 is: 121,752.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,168.60 : 121,752.90 = 81,168.60 : x
  2. Step 2: Convert to fraction form
    81,168.60/121,752.90 = 81,168.60/x
  3. Step 3: Cross multiply
    81,168.60x = 121,752.90 × 81,168.60
  4. Step 4: Simplify right side
    81,168.60x = 9,882,512,438.94
  5. Step 5: Solve for x
    x = 9,882,512,438.94/81,168.60
  6. Step 6: Final answer
    x = 121,752.90

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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.