Home / 278,822.13-417,671.87-128,855.90

Finding the Fourth Proportional to 278,822.13, 417,671.87 and 128,855.90

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Solution

The fourth proportional to 278,822.13, 417,671.87 and 128,855.90 is: 193,024.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,822.13 : 417,671.87 = 128,855.90 : x
  2. Step 2: Convert to fraction form
    278,822.13/417,671.87 = 128,855.90/x
  3. Step 3: Cross multiply
    278,822.13x = 417,671.87 × 128,855.90
  4. Step 4: Simplify right side
    278,822.13x = 53,819,481,980.89
  5. Step 5: Solve for x
    x = 53,819,481,980.89/278,822.13
  6. Step 6: Final answer
    x = 193,024.43

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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.