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Finding the Fourth Proportional to 99,772.80, 149,680.80 and 29,659.20

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Solution

The fourth proportional to 99,772.80, 149,680.80 and 29,659.20 is: 44,495.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,772.80 : 149,680.80 = 29,659.20 : x
  2. Step 2: Convert to fraction form
    99,772.80/149,680.80 = 29,659.20/x
  3. Step 3: Cross multiply
    99,772.80x = 149,680.80 × 29,659.20
  4. Step 4: Simplify right side
    99,772.80x = 4,439,412,783.36
  5. Step 5: Solve for x
    x = 4,439,412,783.36/99,772.80
  6. Step 6: Final answer
    x = 44,495.22

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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.