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Finding the Fourth Proportional to 216,630.73, 298,954.43 and 121,147.93

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Solution

The fourth proportional to 216,630.73, 298,954.43 and 121,147.93 is: 167,186.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,630.73 : 298,954.43 = 121,147.93 : x
  2. Step 2: Convert to fraction form
    216,630.73/298,954.43 = 121,147.93/x
  3. Step 3: Cross multiply
    216,630.73x = 298,954.43 × 121,147.93
  4. Step 4: Simplify right side
    216,630.73x = 36,217,710,358.83
  5. Step 5: Solve for x
    x = 36,217,710,358.83/216,630.73
  6. Step 6: Final answer
    x = 167,186.39

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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.