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Finding the Fourth Proportional to 216,370.34, 324,565.54 and 66,617.34

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Solution

The fourth proportional to 216,370.34, 324,565.54 and 66,617.34 is: 99,929.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,370.34 : 324,565.54 = 66,617.34 : x
  2. Step 2: Convert to fraction form
    216,370.34/324,565.54 = 66,617.34/x
  3. Step 3: Cross multiply
    216,370.34x = 324,565.54 × 66,617.34
  4. Step 4: Simplify right side
    216,370.34x = 21,621,692,763.92
  5. Step 5: Solve for x
    x = 21,621,692,763.92/216,370.34
  6. Step 6: Final answer
    x = 99,929.10

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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.