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Finding the Fourth Proportional to 272,903.36, 409,737.60 and 139,879.04

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Solution

The fourth proportional to 272,903.36, 409,737.60 and 139,879.04 is: 210,014.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,903.36 : 409,737.60 = 139,879.04 : x
  2. Step 2: Convert to fraction form
    272,903.36/409,737.60 = 139,879.04/x
  3. Step 3: Cross multiply
    272,903.36x = 409,737.60 × 139,879.04
  4. Step 4: Simplify right side
    272,903.36x = 57,313,702,139.90
  5. Step 5: Solve for x
    x = 57,313,702,139.90/272,903.36
  6. Step 6: Final answer
    x = 210,014.64

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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.