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Finding the Fourth Proportional to 121,965.84, 182,915.88 and 43,069.68

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Solution

The fourth proportional to 121,965.84, 182,915.88 and 43,069.68 is: 64,592.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,965.84 : 182,915.88 = 43,069.68 : x
  2. Step 2: Convert to fraction form
    121,965.84/182,915.88 = 43,069.68/x
  3. Step 3: Cross multiply
    121,965.84x = 182,915.88 × 43,069.68
  4. Step 4: Simplify right side
    121,965.84x = 7,878,128,418.52
  5. Step 5: Solve for x
    x = 7,878,128,418.52/121,965.84
  6. Step 6: Final answer
    x = 64,592.91

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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.