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Finding the Fourth Proportional to 216,486, 324,443.88 and 91,672.56

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Solution

The fourth proportional to 216,486, 324,443.88 and 91,672.56 is: 137,388.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,486 : 324,443.88 = 91,672.56 : x
  2. Step 2: Convert to fraction form
    216,486/324,443.88 = 91,672.56/x
  3. Step 3: Cross multiply
    216,486x = 324,443.88 × 91,672.56
  4. Step 4: Simplify right side
    216,486x = 29,742,601,055.93
  5. Step 5: Solve for x
    x = 29,742,601,055.93/216,486
  6. Step 6: Final answer
    x = 137,388.10

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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.