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Finding the Fourth Proportional to 122,393.78, 168,920.24 and 68,681.98

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Solution

The fourth proportional to 122,393.78, 168,920.24 and 68,681.98 is: 94,790.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,393.78 : 168,920.24 = 68,681.98 : x
  2. Step 2: Convert to fraction form
    122,393.78/168,920.24 = 68,681.98/x
  3. Step 3: Cross multiply
    122,393.78x = 168,920.24 × 68,681.98
  4. Step 4: Simplify right side
    122,393.78x = 11,601,775,462.84
  5. Step 5: Solve for x
    x = 11,601,775,462.84/122,393.78
  6. Step 6: Final answer
    x = 94,790.56

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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.