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Finding the Fourth Proportional to 216,531, 324,848.58 and 68,787

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Solution

The fourth proportional to 216,531, 324,848.58 and 68,787 is: 103,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,531 : 324,848.58 = 68,787 : x
  2. Step 2: Convert to fraction form
    216,531/324,848.58 = 68,787/x
  3. Step 3: Cross multiply
    216,531x = 324,848.58 × 68,787
  4. Step 4: Simplify right side
    216,531x = 22,345,359,272.46
  5. Step 5: Solve for x
    x = 22,345,359,272.46/216,531
  6. Step 6: Final answer
    x = 103,197.04

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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.