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Finding the Fourth Proportional to 118,122.72, 163,005.80 and 64,408.78

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Solution

The fourth proportional to 118,122.72, 163,005.80 and 64,408.78 is: 88,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,122.72 : 163,005.80 = 64,408.78 : x
  2. Step 2: Convert to fraction form
    118,122.72/163,005.80 = 64,408.78/x
  3. Step 3: Cross multiply
    118,122.72x = 163,005.80 × 64,408.78
  4. Step 4: Simplify right side
    118,122.72x = 10,499,004,592.64
  5. Step 5: Solve for x
    x = 10,499,004,592.64/118,122.72
  6. Step 6: Final answer
    x = 88,882.18

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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.