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Finding the Fourth Proportional to 216,889.11, 299,306.93 and 121,395.83

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Solution

The fourth proportional to 216,889.11, 299,306.93 and 121,395.83 is: 167,526.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,889.11 : 299,306.93 = 121,395.83 : x
  2. Step 2: Convert to fraction form
    216,889.11/299,306.93 = 121,395.83/x
  3. Step 3: Cross multiply
    216,889.11x = 299,306.93 × 121,395.83
  4. Step 4: Simplify right side
    216,889.11x = 36,334,611,088.59
  5. Step 5: Solve for x
    x = 36,334,611,088.59/216,889.11
  6. Step 6: Final answer
    x = 167,526.21

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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.