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Finding the Fourth Proportional to 118,506.68, 163,538.80 and 64,791.60

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Solution

The fourth proportional to 118,506.68, 163,538.80 and 64,791.60 is: 89,412.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,506.68 : 163,538.80 = 64,791.60 : x
  2. Step 2: Convert to fraction form
    118,506.68/163,538.80 = 64,791.60/x
  3. Step 3: Cross multiply
    118,506.68x = 163,538.80 × 64,791.60
  4. Step 4: Simplify right side
    118,506.68x = 10,595,940,514.08
  5. Step 5: Solve for x
    x = 10,595,940,514.08/118,506.68
  6. Step 6: Final answer
    x = 89,412.18

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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.