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Finding the Fourth Proportional to 118,704.68, 163,814.40 and 64,988.78

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Solution

The fourth proportional to 118,704.68, 163,814.40 and 64,988.78 is: 89,685.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,704.68 : 163,814.40 = 64,988.78 : x
  2. Step 2: Convert to fraction form
    118,704.68/163,814.40 = 64,988.78/x
  3. Step 3: Cross multiply
    118,704.68x = 163,814.40 × 64,988.78
  4. Step 4: Simplify right side
    118,704.68x = 10,646,098,002.43
  5. Step 5: Solve for x
    x = 10,646,098,002.43/118,704.68
  6. Step 6: Final answer
    x = 89,685.58

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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.