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Finding the Fourth Proportional to 181,978.80, 272,919.60 and 55,618.80

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Solution

The fourth proportional to 181,978.80, 272,919.60 and 55,618.80 is: 83,413.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,978.80 : 272,919.60 = 55,618.80 : x
  2. Step 2: Convert to fraction form
    181,978.80/272,919.60 = 55,618.80/x
  3. Step 3: Cross multiply
    181,978.80x = 272,919.60 × 55,618.80
  4. Step 4: Simplify right side
    181,978.80x = 15,179,460,648.48
  5. Step 5: Solve for x
    x = 15,179,460,648.48/181,978.80
  6. Step 6: Final answer
    x = 83,413.35

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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.