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Finding the Fourth Proportional to 216,481.64, 298,551.16 and 135,916.64

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Solution

The fourth proportional to 216,481.64, 298,551.16 and 135,916.64 is: 187,443.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,481.64 : 298,551.16 = 135,916.64 : x
  2. Step 2: Convert to fraction form
    216,481.64/298,551.16 = 135,916.64/x
  3. Step 3: Cross multiply
    216,481.64x = 298,551.16 × 135,916.64
  4. Step 4: Simplify right side
    216,481.64x = 40,578,070,535.30
  5. Step 5: Solve for x
    x = 40,578,070,535.30/216,481.64
  6. Step 6: Final answer
    x = 187,443.47

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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.