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Finding the Fourth Proportional to 99,812.80, 149,546.40 and 64,734.40

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Solution

The fourth proportional to 99,812.80, 149,546.40 and 64,734.40 is: 96,989.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,812.80 : 149,546.40 = 64,734.40 : x
  2. Step 2: Convert to fraction form
    99,812.80/149,546.40 = 64,734.40/x
  3. Step 3: Cross multiply
    99,812.80x = 149,546.40 × 64,734.40
  4. Step 4: Simplify right side
    99,812.80x = 9,680,796,476.16
  5. Step 5: Solve for x
    x = 9,680,796,476.16/99,812.80
  6. Step 6: Final answer
    x = 96,989.53

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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.