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Finding the Fourth Proportional to 118,203.87, 163,115.64 and 64,485.68

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Solution

The fourth proportional to 118,203.87, 163,115.64 and 64,485.68 is: 88,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,203.87 : 163,115.64 = 64,485.68 : x
  2. Step 2: Convert to fraction form
    118,203.87/163,115.64 = 64,485.68/x
  3. Step 3: Cross multiply
    118,203.87x = 163,115.64 × 64,485.68
  4. Step 4: Simplify right side
    118,203.87x = 10,518,622,964.04
  5. Step 5: Solve for x
    x = 10,518,622,964.04/118,203.87
  6. Step 6: Final answer
    x = 88,987.13

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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.