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Finding the Fourth Proportional to 181,787.40, 272,413.80 and 131,972.40

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Solution

The fourth proportional to 181,787.40, 272,413.80 and 131,972.40 is: 197,764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,787.40 : 272,413.80 = 131,972.40 : x
  2. Step 2: Convert to fraction form
    181,787.40/272,413.80 = 131,972.40/x
  3. Step 3: Cross multiply
    181,787.40x = 272,413.80 × 131,972.40
  4. Step 4: Simplify right side
    181,787.40x = 35,951,102,979.12
  5. Step 5: Solve for x
    x = 35,951,102,979.12/181,787.40
  6. Step 6: Final answer
    x = 197,764.55

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1.5x scale

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.