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Finding the Fourth Proportional to 118,700.49, 163,806.84 and 64,985.88

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Solution

The fourth proportional to 118,700.49, 163,806.84 and 64,985.88 is: 89,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,700.49 : 163,806.84 = 64,985.88 : x
  2. Step 2: Convert to fraction form
    118,700.49/163,806.84 = 64,985.88/x
  3. Step 3: Cross multiply
    118,700.49x = 163,806.84 × 64,985.88
  4. Step 4: Simplify right side
    118,700.49x = 10,645,131,647.42
  5. Step 5: Solve for x
    x = 10,645,131,647.42/118,700.49
  6. Step 6: Final answer
    x = 89,680.60

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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.