Home / 315,881.20-435,909.57-172,642.26

Finding the Fourth Proportional to 315,881.20, 435,909.57 and 172,642.26

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Solution

The fourth proportional to 315,881.20, 435,909.57 and 172,642.26 is: 238,242.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,881.20 : 435,909.57 = 172,642.26 : x
  2. Step 2: Convert to fraction form
    315,881.20/435,909.57 = 172,642.26/x
  3. Step 3: Cross multiply
    315,881.20x = 435,909.57 × 172,642.26
  4. Step 4: Simplify right side
    315,881.20x = 75,256,413,320.43
  5. Step 5: Solve for x
    x = 75,256,413,320.43/315,881.20
  6. Step 6: Final answer
    x = 238,242.77

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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.