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Finding the Fourth Proportional to 278,955.78, 418,178.52 and 121,127.28

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Solution

The fourth proportional to 278,955.78, 418,178.52 and 121,127.28 is: 181,580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,955.78 : 418,178.52 = 121,127.28 : x
  2. Step 2: Convert to fraction form
    278,955.78/418,178.52 = 121,127.28/x
  3. Step 3: Cross multiply
    278,955.78x = 418,178.52 × 121,127.28
  4. Step 4: Simplify right side
    278,955.78x = 50,652,826,682.03
  5. Step 5: Solve for x
    x = 50,652,826,682.03/278,955.78
  6. Step 6: Final answer
    x = 181,580.13

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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.