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Finding the Fourth Proportional to 99,580.40, 148,933.20 and 75,960.80

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Solution

The fourth proportional to 99,580.40, 148,933.20 and 75,960.80 is: 113,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,580.40 : 148,933.20 = 75,960.80 : x
  2. Step 2: Convert to fraction form
    99,580.40/148,933.20 = 75,960.80/x
  3. Step 3: Cross multiply
    99,580.40x = 148,933.20 × 75,960.80
  4. Step 4: Simplify right side
    99,580.40x = 11,313,085,018.56
  5. Step 5: Solve for x
    x = 11,313,085,018.56/99,580.40
  6. Step 6: Final answer
    x = 113,607.55

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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.