Home / 272,786.19-408,916.84-139,729.11

Finding the Fourth Proportional to 272,786.19, 408,916.84 and 139,729.11

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Solution

The fourth proportional to 272,786.19, 408,916.84 and 139,729.11 is: 209,459.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,786.19 : 408,916.84 = 139,729.11 : x
  2. Step 2: Convert to fraction form
    272,786.19/408,916.84 = 139,729.11/x
  3. Step 3: Cross multiply
    272,786.19x = 408,916.84 × 139,729.11
  4. Step 4: Simplify right side
    272,786.19x = 57,137,586,117.21
  5. Step 5: Solve for x
    x = 57,137,586,117.21/272,786.19
  6. Step 6: Final answer
    x = 209,459.23

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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.