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Finding the Fourth Proportional to 121,770.59, 168,045.31 and 68,059.08

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Solution

The fourth proportional to 121,770.59, 168,045.31 and 68,059.08 is: 93,922.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,770.59 : 168,045.31 = 68,059.08 : x
  2. Step 2: Convert to fraction form
    121,770.59/168,045.31 = 68,059.08/x
  3. Step 3: Cross multiply
    121,770.59x = 168,045.31 × 68,059.08
  4. Step 4: Simplify right side
    121,770.59x = 11,437,009,026.77
  5. Step 5: Solve for x
    x = 11,437,009,026.77/121,770.59
  6. Step 6: Final answer
    x = 93,922.59

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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.