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Finding the Fourth Proportional to 99,591.60, 149,168.70 and 69,848.40

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Solution

The fourth proportional to 99,591.60, 149,168.70 and 69,848.40 is: 104,619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,591.60 : 149,168.70 = 69,848.40 : x
  2. Step 2: Convert to fraction form
    99,591.60/149,168.70 = 69,848.40/x
  3. Step 3: Cross multiply
    99,591.60x = 149,168.70 × 69,848.40
  4. Step 4: Simplify right side
    99,591.60x = 10,419,195,025.08
  5. Step 5: Solve for x
    x = 10,419,195,025.08/99,591.60
  6. Step 6: Final answer
    x = 104,619.22

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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.