Home / 278,318.10-417,574.35-100,830.90

Finding the Fourth Proportional to 278,318.10, 417,574.35 and 100,830.90

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Solution

The fourth proportional to 278,318.10, 417,574.35 and 100,830.90 is: 151,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,318.10 : 417,574.35 = 100,830.90 : x
  2. Step 2: Convert to fraction form
    278,318.10/417,574.35 = 100,830.90/x
  3. Step 3: Cross multiply
    278,318.10x = 417,574.35 × 100,830.90
  4. Step 4: Simplify right side
    278,318.10x = 42,104,397,527.42
  5. Step 5: Solve for x
    x = 42,104,397,527.42/278,318.10
  6. Step 6: Final answer
    x = 151,281.56

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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.