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Finding the Fourth Proportional to 112,910.88, 155,808.54 and 61,915.44

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Solution

The fourth proportional to 112,910.88, 155,808.54 and 61,915.44 is: 85,438.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,910.88 : 155,808.54 = 61,915.44 : x
  2. Step 2: Convert to fraction form
    112,910.88/155,808.54 = 61,915.44/x
  3. Step 3: Cross multiply
    112,910.88x = 155,808.54 × 61,915.44
  4. Step 4: Simplify right side
    112,910.88x = 9,646,954,309.86
  5. Step 5: Solve for x
    x = 9,646,954,309.86/112,910.88
  6. Step 6: Final answer
    x = 85,438.66

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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.