Home / 315,869.76-435,899.22-172,629.78

Finding the Fourth Proportional to 315,869.76, 435,899.22 and 172,629.78

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Solution

The fourth proportional to 315,869.76, 435,899.22 and 172,629.78 is: 238,228.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,869.76 : 435,899.22 = 172,629.78 : x
  2. Step 2: Convert to fraction form
    315,869.76/435,899.22 = 172,629.78/x
  3. Step 3: Cross multiply
    315,869.76x = 435,899.22 × 172,629.78
  4. Step 4: Simplify right side
    315,869.76x = 75,249,186,450.77
  5. Step 5: Solve for x
    x = 75,249,186,450.77/315,869.76
  6. Step 6: Final answer
    x = 238,228.52

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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.