Home / 278,320.10-417,455.85-91,331.60

Finding the Fourth Proportional to 278,320.10, 417,455.85 and 91,331.60

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Solution

The fourth proportional to 278,320.10, 417,455.85 and 91,331.60 is: 136,989.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,320.10 : 417,455.85 = 91,331.60 : x
  2. Step 2: Convert to fraction form
    278,320.10/417,455.85 = 91,331.60/x
  3. Step 3: Cross multiply
    278,320.10x = 417,455.85 × 91,331.60
  4. Step 4: Simplify right side
    278,320.10x = 38,126,910,709.86
  5. Step 5: Solve for x
    x = 38,126,910,709.86/278,320.10
  6. Step 6: Final answer
    x = 136,989.43

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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.