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Finding the Fourth Proportional to 118,702.82, 163,812.76 and 64,987.68

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Solution

The fourth proportional to 118,702.82, 163,812.76 and 64,987.68 is: 89,684.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,702.82 : 163,812.76 = 64,987.68 : x
  2. Step 2: Convert to fraction form
    118,702.82/163,812.76 = 64,987.68/x
  3. Step 3: Cross multiply
    118,702.82x = 163,812.76 × 64,987.68
  4. Step 4: Simplify right side
    118,702.82x = 10,645,811,226.80
  5. Step 5: Solve for x
    x = 10,645,811,226.80/118,702.82
  6. Step 6: Final answer
    x = 89,684.57

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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.