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Finding the Fourth Proportional to 216,643.20, 324,308.70 and 163,717.80

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Solution

The fourth proportional to 216,643.20, 324,308.70 and 163,717.80 is: 245,080.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,643.20 : 324,308.70 = 163,717.80 : x
  2. Step 2: Convert to fraction form
    216,643.20/324,308.70 = 163,717.80/x
  3. Step 3: Cross multiply
    216,643.20x = 324,308.70 × 163,717.80
  4. Step 4: Simplify right side
    216,643.20x = 53,095,106,884.86
  5. Step 5: Solve for x
    x = 53,095,106,884.86/216,643.20
  6. Step 6: Final answer
    x = 245,080.88

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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.