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Finding the Fourth Proportional to 118,671.78, 163,760.70 and 64,946.40

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Solution

The fourth proportional to 118,671.78, 163,760.70 and 64,946.40 is: 89,622.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,671.78 : 163,760.70 = 64,946.40 : x
  2. Step 2: Convert to fraction form
    118,671.78/163,760.70 = 64,946.40/x
  3. Step 3: Cross multiply
    118,671.78x = 163,760.70 × 64,946.40
  4. Step 4: Simplify right side
    118,671.78x = 10,635,667,926.48
  5. Step 5: Solve for x
    x = 10,635,667,926.48/118,671.78
  6. Step 6: Final answer
    x = 89,622.55

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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.