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Finding the Fourth Proportional to 121,107.20, 181,660.80 and 61,923.20

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Solution

The fourth proportional to 121,107.20, 181,660.80 and 61,923.20 is: 92,884.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,107.20 : 181,660.80 = 61,923.20 : x
  2. Step 2: Convert to fraction form
    121,107.20/181,660.80 = 61,923.20/x
  3. Step 3: Cross multiply
    121,107.20x = 181,660.80 × 61,923.20
  4. Step 4: Simplify right side
    121,107.20x = 11,249,018,050.56
  5. Step 5: Solve for x
    x = 11,249,018,050.56/121,107.20
  6. Step 6: Final answer
    x = 92,884.80

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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.