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Finding the Fourth Proportional to 121,898, 168,214.64 and 68,187.98

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Solution

The fourth proportional to 121,898, 168,214.64 and 68,187.98 is: 94,096.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,898 : 168,214.64 = 68,187.98 : x
  2. Step 2: Convert to fraction form
    121,898/168,214.64 = 68,187.98/x
  3. Step 3: Cross multiply
    121,898x = 168,214.64 × 68,187.98
  4. Step 4: Simplify right side
    121,898x = 11,470,216,508.03
  5. Step 5: Solve for x
    x = 11,470,216,508.03/121,898
  6. Step 6: Final answer
    x = 94,096.84

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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.