Home / 278,541.53-417,872.26-86,412.06

Finding the Fourth Proportional to 278,541.53, 417,872.26 and 86,412.06

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Solution

The fourth proportional to 278,541.53, 417,872.26 and 86,412.06 is: 129,636.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,541.53 : 417,872.26 = 86,412.06 : x
  2. Step 2: Convert to fraction form
    278,541.53/417,872.26 = 86,412.06/x
  3. Step 3: Cross multiply
    278,541.53x = 417,872.26 × 86,412.06
  4. Step 4: Simplify right side
    278,541.53x = 36,109,202,911.47
  5. Step 5: Solve for x
    x = 36,109,202,911.47/278,541.53
  6. Step 6: Final answer
    x = 129,636.69

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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.