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Finding the Fourth Proportional to 121,745.41, 168,008.31 and 68,030.48

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Solution

The fourth proportional to 121,745.41, 168,008.31 and 68,030.48 is: 93,881.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,745.41 : 168,008.31 = 68,030.48 : x
  2. Step 2: Convert to fraction form
    121,745.41/168,008.31 = 68,030.48/x
  3. Step 3: Cross multiply
    121,745.41x = 168,008.31 × 68,030.48
  4. Step 4: Simplify right side
    121,745.41x = 11,429,686,393.31
  5. Step 5: Solve for x
    x = 11,429,686,393.31/121,745.41
  6. Step 6: Final answer
    x = 93,881.87

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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.