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Finding the Fourth Proportional to 99,312.80, 149,026.80 and 36,989.60

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Solution

The fourth proportional to 99,312.80, 149,026.80 and 36,989.60 is: 55,505.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,312.80 : 149,026.80 = 36,989.60 : x
  2. Step 2: Convert to fraction form
    99,312.80/149,026.80 = 36,989.60/x
  3. Step 3: Cross multiply
    99,312.80x = 149,026.80 × 36,989.60
  4. Step 4: Simplify right side
    99,312.80x = 5,512,441,721.28
  5. Step 5: Solve for x
    x = 5,512,441,721.28/99,312.80
  6. Step 6: Final answer
    x = 55,505.85

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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.