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Finding the Fourth Proportional to 118,703.68, 163,813.02 and 64,987.78

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Solution

The fourth proportional to 118,703.68, 163,813.02 and 64,987.78 is: 89,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,703.68 : 163,813.02 = 64,987.78 : x
  2. Step 2: Convert to fraction form
    118,703.68/163,813.02 = 64,987.78/x
  3. Step 3: Cross multiply
    118,703.68x = 163,813.02 × 64,987.78
  4. Step 4: Simplify right side
    118,703.68x = 10,645,844,504.90
  5. Step 5: Solve for x
    x = 10,645,844,504.90/118,703.68
  6. Step 6: Final answer
    x = 89,684.20

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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.