Home / 315,739.40-435,720.71-172,501.83

Finding the Fourth Proportional to 315,739.40, 435,720.71 and 172,501.83

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Solution

The fourth proportional to 315,739.40, 435,720.71 and 172,501.83 is: 238,052.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,739.40 : 435,720.71 = 172,501.83 : x
  2. Step 2: Convert to fraction form
    315,739.40/435,720.71 = 172,501.83/x
  3. Step 3: Cross multiply
    315,739.40x = 435,720.71 × 172,501.83
  4. Step 4: Simplify right side
    315,739.40x = 75,162,619,843.90
  5. Step 5: Solve for x
    x = 75,162,619,843.90/315,739.40
  6. Step 6: Final answer
    x = 238,052.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.