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Finding the Fourth Proportional to 278,873.49, 418,226.40 and 79,210.11

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Solution

The fourth proportional to 278,873.49, 418,226.40 and 79,210.11 is: 118,791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,873.49 : 418,226.40 = 79,210.11 : x
  2. Step 2: Convert to fraction form
    278,873.49/418,226.40 = 79,210.11/x
  3. Step 3: Cross multiply
    278,873.49x = 418,226.40 × 79,210.11
  4. Step 4: Simplify right side
    278,873.49x = 33,127,759,148.90
  5. Step 5: Solve for x
    x = 33,127,759,148.90/278,873.49
  6. Step 6: Final answer
    x = 118,791.35

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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.