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Finding the Fourth Proportional to 141,076.80, 211,384.80 and 121,262.40

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Solution

The fourth proportional to 141,076.80, 211,384.80 and 121,262.40 is: 181,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,076.80 : 211,384.80 = 121,262.40 : x
  2. Step 2: Convert to fraction form
    141,076.80/211,384.80 = 121,262.40/x
  3. Step 3: Cross multiply
    141,076.80x = 211,384.80 × 121,262.40
  4. Step 4: Simplify right side
    141,076.80x = 25,633,028,171.52
  5. Step 5: Solve for x
    x = 25,633,028,171.52/141,076.80
  6. Step 6: Final answer
    x = 181,695.56

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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.