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Finding the Fourth Proportional to 99,840.54, 149,720.49 and 49,901.34

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Solution

The fourth proportional to 99,840.54, 149,720.49 and 49,901.34 is: 74,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,840.54 : 149,720.49 = 49,901.34 : x
  2. Step 2: Convert to fraction form
    99,840.54/149,720.49 = 49,901.34/x
  3. Step 3: Cross multiply
    99,840.54x = 149,720.49 × 49,901.34
  4. Step 4: Simplify right side
    99,840.54x = 7,471,253,076.46
  5. Step 5: Solve for x
    x = 7,471,253,076.46/99,840.54
  6. Step 6: Final answer
    x = 74,831.86

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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.