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Finding the Fourth Proportional to 181,591.20, 272,386.80 and 139,552.20

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Solution

The fourth proportional to 181,591.20, 272,386.80 and 139,552.20 is: 209,328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,591.20 : 272,386.80 = 139,552.20 : x
  2. Step 2: Convert to fraction form
    181,591.20/272,386.80 = 139,552.20/x
  3. Step 3: Cross multiply
    181,591.20x = 272,386.80 × 139,552.20
  4. Step 4: Simplify right side
    181,591.20x = 38,012,177,190.96
  5. Step 5: Solve for x
    x = 38,012,177,190.96/181,591.20
  6. Step 6: Final answer
    x = 209,328.30

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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.