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Finding the Fourth Proportional to 221,083.67, 331,695.59 and 78,925.85

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Solution

The fourth proportional to 221,083.67, 331,695.59 and 78,925.85 is: 118,413.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,083.67 : 331,695.59 = 78,925.85 : x
  2. Step 2: Convert to fraction form
    221,083.67/331,695.59 = 78,925.85/x
  3. Step 3: Cross multiply
    221,083.67x = 331,695.59 × 78,925.85
  4. Step 4: Simplify right side
    221,083.67x = 26,179,354,328.89
  5. Step 5: Solve for x
    x = 26,179,354,328.89/221,083.67
  6. Step 6: Final answer
    x = 118,413.79

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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.