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Finding the Fourth Proportional to 216,882.61, 299,297.95 and 121,389.31

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Solution

The fourth proportional to 216,882.61, 299,297.95 and 121,389.31 is: 167,517.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,882.61 : 299,297.95 = 121,389.31 : x
  2. Step 2: Convert to fraction form
    216,882.61/299,297.95 = 121,389.31/x
  3. Step 3: Cross multiply
    216,882.61x = 299,297.95 × 121,389.31
  4. Step 4: Simplify right side
    216,882.61x = 36,331,571,634.91
  5. Step 5: Solve for x
    x = 36,331,571,634.91/216,882.61
  6. Step 6: Final answer
    x = 167,517.22

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1.5x scale

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.