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Finding the Fourth Proportional to 216,343.68, 324,427.86 and 89,898

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Solution

The fourth proportional to 216,343.68, 324,427.86 and 89,898 is: 134,810.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,343.68 : 324,427.86 = 89,898 : x
  2. Step 2: Convert to fraction form
    216,343.68/324,427.86 = 89,898/x
  3. Step 3: Cross multiply
    216,343.68x = 324,427.86 × 89,898
  4. Step 4: Simplify right side
    216,343.68x = 29,165,415,758.28
  5. Step 5: Solve for x
    x = 29,165,415,758.28/216,343.68
  6. Step 6: Final answer
    x = 134,810.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.