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Finding the Fourth Proportional to 121,858.88, 182,880.64 and 51,787.52

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Solution

The fourth proportional to 121,858.88, 182,880.64 and 51,787.52 is: 77,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,858.88 : 182,880.64 = 51,787.52 : x
  2. Step 2: Convert to fraction form
    121,858.88/182,880.64 = 51,787.52/x
  3. Step 3: Cross multiply
    121,858.88x = 182,880.64 × 51,787.52
  4. Step 4: Simplify right side
    121,858.88x = 9,470,934,801.61
  5. Step 5: Solve for x
    x = 9,470,934,801.61/121,858.88
  6. Step 6: Final answer
    x = 77,720.51

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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.