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Finding the Fourth Proportional to 122,521.60, 183,787.80 and 69,212.80

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Solution

The fourth proportional to 122,521.60, 183,787.80 and 69,212.80 is: 103,822.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,521.60 : 183,787.80 = 69,212.80 : x
  2. Step 2: Convert to fraction form
    122,521.60/183,787.80 = 69,212.80/x
  3. Step 3: Cross multiply
    122,521.60x = 183,787.80 × 69,212.80
  4. Step 4: Simplify right side
    122,521.60x = 12,720,468,243.84
  5. Step 5: Solve for x
    x = 12,720,468,243.84/122,521.60
  6. Step 6: Final answer
    x = 103,822.25

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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.