Home / 315,087.12-472,628.24-78,428.22

Finding the Fourth Proportional to 315,087.12, 472,628.24 and 78,428.22

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Solution

The fourth proportional to 315,087.12, 472,628.24 and 78,428.22 is: 117,641.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,087.12 : 472,628.24 = 78,428.22 : x
  2. Step 2: Convert to fraction form
    315,087.12/472,628.24 = 78,428.22/x
  3. Step 3: Cross multiply
    315,087.12x = 472,628.24 × 78,428.22
  4. Step 4: Simplify right side
    315,087.12x = 37,067,391,584.93
  5. Step 5: Solve for x
    x = 37,067,391,584.93/315,087.12
  6. Step 6: Final answer
    x = 117,641.72

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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.