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Finding the Fourth Proportional to 118,701.91, 163,808.67 and 64,990.39

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Solution

The fourth proportional to 118,701.91, 163,808.67 and 64,990.39 is: 89,686.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,701.91 : 163,808.67 = 64,990.39 : x
  2. Step 2: Convert to fraction form
    118,701.91/163,808.67 = 64,990.39/x
  3. Step 3: Cross multiply
    118,701.91x = 163,808.67 × 64,990.39
  4. Step 4: Simplify right side
    118,701.91x = 10,645,989,348.68
  5. Step 5: Solve for x
    x = 10,645,989,348.68/118,701.91
  6. Step 6: Final answer
    x = 89,686.76

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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.