Home / 278,631.20-417,946.80-138,663.20

Finding the Fourth Proportional to 278,631.20, 417,946.80 and 138,663.20

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Solution

The fourth proportional to 278,631.20, 417,946.80 and 138,663.20 is: 207,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,631.20 : 417,946.80 = 138,663.20 : x
  2. Step 2: Convert to fraction form
    278,631.20/417,946.80 = 138,663.20/x
  3. Step 3: Cross multiply
    278,631.20x = 417,946.80 × 138,663.20
  4. Step 4: Simplify right side
    278,631.20x = 57,953,840,717.76
  5. Step 5: Solve for x
    x = 57,953,840,717.76/278,631.20
  6. Step 6: Final answer
    x = 207,994.80

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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.