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Finding the Fourth Proportional to 216,882.30, 299,297.54 and 121,389

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Solution

The fourth proportional to 216,882.30, 299,297.54 and 121,389 is: 167,516.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,882.30 : 299,297.54 = 121,389 : x
  2. Step 2: Convert to fraction form
    216,882.30/299,297.54 = 121,389/x
  3. Step 3: Cross multiply
    216,882.30x = 299,297.54 × 121,389
  4. Step 4: Simplify right side
    216,882.30x = 36,331,429,083.06
  5. Step 5: Solve for x
    x = 36,331,429,083.06/216,882.30
  6. Step 6: Final answer
    x = 167,516.80

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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.