Home / 315,899.23-435,970.79-172,680.52

Finding the Fourth Proportional to 315,899.23, 435,970.79 and 172,680.52

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Solution

The fourth proportional to 315,899.23, 435,970.79 and 172,680.52 is: 238,315.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,899.23 : 435,970.79 = 172,680.52 : x
  2. Step 2: Convert to fraction form
    315,899.23/435,970.79 = 172,680.52/x
  3. Step 3: Cross multiply
    315,899.23x = 435,970.79 × 172,680.52
  4. Step 4: Simplify right side
    315,899.23x = 75,283,662,722.01
  5. Step 5: Solve for x
    x = 75,283,662,722.01/315,899.23
  6. Step 6: Final answer
    x = 238,315.44

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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.