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Finding the Fourth Proportional to 216,215.66, 324,354.48 and 66,468.50

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Solution

The fourth proportional to 216,215.66, 324,354.48 and 66,468.50 is: 99,712.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,215.66 : 324,354.48 = 66,468.50 : x
  2. Step 2: Convert to fraction form
    216,215.66/324,354.48 = 66,468.50/x
  3. Step 3: Cross multiply
    216,215.66x = 324,354.48 × 66,468.50
  4. Step 4: Simplify right side
    216,215.66x = 21,559,354,132.11
  5. Step 5: Solve for x
    x = 21,559,354,132.11/216,215.66
  6. Step 6: Final answer
    x = 99,712.27

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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.