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Finding the Fourth Proportional to 118,706.52, 163,815.12 and 64,991.88

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Solution

The fourth proportional to 118,706.52, 163,815.12 and 64,991.88 is: 89,688.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,706.52 : 163,815.12 = 64,991.88 : x
  2. Step 2: Convert to fraction form
    118,706.52/163,815.12 = 64,991.88/x
  3. Step 3: Cross multiply
    118,706.52x = 163,815.12 × 64,991.88
  4. Step 4: Simplify right side
    118,706.52x = 10,646,652,621.23
  5. Step 5: Solve for x
    x = 10,646,652,621.23/118,706.52
  6. Step 6: Final answer
    x = 89,688.86

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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.