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Finding the Fourth Proportional to 216,702.44, 299,043.60 and 121,219.64

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Solution

The fourth proportional to 216,702.44, 299,043.60 and 121,219.64 is: 167,279.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,702.44 : 299,043.60 = 121,219.64 : x
  2. Step 2: Convert to fraction form
    216,702.44/299,043.60 = 121,219.64/x
  3. Step 3: Cross multiply
    216,702.44x = 299,043.60 × 121,219.64
  4. Step 4: Simplify right side
    216,702.44x = 36,249,957,536.30
  5. Step 5: Solve for x
    x = 36,249,957,536.30/216,702.44
  6. Step 6: Final answer
    x = 167,279.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.