Home / 272,621.76-409,131.36-139,613.28

Finding the Fourth Proportional to 272,621.76, 409,131.36 and 139,613.28

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Solution

The fourth proportional to 272,621.76, 409,131.36 and 139,613.28 is: 209,521.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,621.76 : 409,131.36 = 139,613.28 : x
  2. Step 2: Convert to fraction form
    272,621.76/409,131.36 = 139,613.28/x
  3. Step 3: Cross multiply
    272,621.76x = 409,131.36 × 139,613.28
  4. Step 4: Simplify right side
    272,621.76x = 57,120,171,120.46
  5. Step 5: Solve for x
    x = 57,120,171,120.46/272,621.76
  6. Step 6: Final answer
    x = 209,521.69

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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.