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Finding the Fourth Proportional to 118,711.88, 163,821.32 and 64,263.78

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Solution

The fourth proportional to 118,711.88, 163,821.32 and 64,263.78 is: 88,683.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,711.88 : 163,821.32 = 64,263.78 : x
  2. Step 2: Convert to fraction form
    118,711.88/163,821.32 = 64,263.78/x
  3. Step 3: Cross multiply
    118,711.88x = 163,821.32 × 64,263.78
  4. Step 4: Simplify right side
    118,711.88x = 10,527,777,267.79
  5. Step 5: Solve for x
    x = 10,527,777,267.79/118,711.88
  6. Step 6: Final answer
    x = 88,683.43

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1.5x scale

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.