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Finding the Fourth Proportional to 112,896.66, 155,796.11 and 65,148.98

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Solution

The fourth proportional to 112,896.66, 155,796.11 and 65,148.98 is: 89,904.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,896.66 : 155,796.11 = 65,148.98 : x
  2. Step 2: Convert to fraction form
    112,896.66/155,796.11 = 65,148.98/x
  3. Step 3: Cross multiply
    112,896.66x = 155,796.11 × 65,148.98
  4. Step 4: Simplify right side
    112,896.66x = 10,149,957,718.21
  5. Step 5: Solve for x
    x = 10,149,957,718.21/112,896.66
  6. Step 6: Final answer
    x = 89,904.85

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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.