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Finding the Fourth Proportional to 112,775.88, 155,630.62 and 61,791.90

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Solution

The fourth proportional to 112,775.88, 155,630.62 and 61,791.90 is: 85,272.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,775.88 : 155,630.62 = 61,791.90 : x
  2. Step 2: Convert to fraction form
    112,775.88/155,630.62 = 61,791.90/x
  3. Step 3: Cross multiply
    112,775.88x = 155,630.62 × 61,791.90
  4. Step 4: Simplify right side
    112,775.88x = 9,616,711,707.98
  5. Step 5: Solve for x
    x = 9,616,711,707.98/112,775.88
  6. Step 6: Final answer
    x = 85,272.77

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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.