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Finding the Fourth Proportional to 121,687.48, 167,927.30 and 67,977.72

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Solution

The fourth proportional to 121,687.48, 167,927.30 and 67,977.72 is: 93,808.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,687.48 : 167,927.30 = 67,977.72 : x
  2. Step 2: Convert to fraction form
    121,687.48/167,927.30 = 67,977.72/x
  3. Step 3: Cross multiply
    121,687.48x = 167,927.30 × 67,977.72
  4. Step 4: Simplify right side
    121,687.48x = 11,415,314,979.76
  5. Step 5: Solve for x
    x = 11,415,314,979.76/121,687.48
  6. Step 6: Final answer
    x = 93,808.46

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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.