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Finding the Fourth Proportional to 118,380.45, 163,362.98 and 64,664.09

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Solution

The fourth proportional to 118,380.45, 163,362.98 and 64,664.09 is: 89,235.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,380.45 : 163,362.98 = 64,664.09 : x
  2. Step 2: Convert to fraction form
    118,380.45/163,362.98 = 64,664.09/x
  3. Step 3: Cross multiply
    118,380.45x = 163,362.98 × 64,664.09
  4. Step 4: Simplify right side
    118,380.45x = 10,563,718,035.11
  5. Step 5: Solve for x
    x = 10,563,718,035.11/118,380.45
  6. Step 6: Final answer
    x = 89,235.32

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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.