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Finding the Fourth Proportional to 99,787.78, 149,552.07 and 40,554.52

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Solution

The fourth proportional to 99,787.78, 149,552.07 and 40,554.52 is: 60,779.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,787.78 : 149,552.07 = 40,554.52 : x
  2. Step 2: Convert to fraction form
    99,787.78/149,552.07 = 40,554.52/x
  3. Step 3: Cross multiply
    99,787.78x = 149,552.07 × 40,554.52
  4. Step 4: Simplify right side
    99,787.78x = 6,065,012,413.86
  5. Step 5: Solve for x
    x = 6,065,012,413.86/99,787.78
  6. Step 6: Final answer
    x = 60,779.11

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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.