Home / 154,403.45-231,570.32-78,425.04

Finding the Fourth Proportional to 154,403.45, 231,570.32 and 78,425.04

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Solution

The fourth proportional to 154,403.45, 231,570.32 and 78,425.04 is: 117,619.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,403.45 : 231,570.32 = 78,425.04 : x
  2. Step 2: Convert to fraction form
    154,403.45/231,570.32 = 78,425.04/x
  3. Step 3: Cross multiply
    154,403.45x = 231,570.32 × 78,425.04
  4. Step 4: Simplify right side
    154,403.45x = 18,160,911,216.69
  5. Step 5: Solve for x
    x = 18,160,911,216.69/154,403.45
  6. Step 6: Final answer
    x = 117,619.86

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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.