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Finding the Fourth Proportional to 118,442.82, 163,451.52 and 64,728.66

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Solution

The fourth proportional to 118,442.82, 163,451.52 and 64,728.66 is: 89,325.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,442.82 : 163,451.52 = 64,728.66 : x
  2. Step 2: Convert to fraction form
    118,442.82/163,451.52 = 64,728.66/x
  3. Step 3: Cross multiply
    118,442.82x = 163,451.52 × 64,728.66
  4. Step 4: Simplify right side
    118,442.82x = 10,579,997,864.56
  5. Step 5: Solve for x
    x = 10,579,997,864.56/118,442.82
  6. Step 6: Final answer
    x = 89,325.78

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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.