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Finding the Fourth Proportional to 132,909.84, 183,413.28 and 72,480.96

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Solution

The fourth proportional to 132,909.84, 183,413.28 and 72,480.96 is: 100,022.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,909.84 : 183,413.28 = 72,480.96 : x
  2. Step 2: Convert to fraction form
    132,909.84/183,413.28 = 72,480.96/x
  3. Step 3: Cross multiply
    132,909.84x = 183,413.28 × 72,480.96
  4. Step 4: Simplify right side
    132,909.84x = 13,293,970,611.15
  5. Step 5: Solve for x
    x = 13,293,970,611.15/132,909.84
  6. Step 6: Final answer
    x = 100,022.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.