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Finding the Fourth Proportional to 118,689.18, 163,786.98 and 67,718.42

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Solution

The fourth proportional to 118,689.18, 163,786.98 and 67,718.42 is: 93,449.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,689.18 : 163,786.98 = 67,718.42 : x
  2. Step 2: Convert to fraction form
    118,689.18/163,786.98 = 67,718.42/x
  3. Step 3: Cross multiply
    118,689.18x = 163,786.98 × 67,718.42
  4. Step 4: Simplify right side
    118,689.18x = 11,091,395,502.17
  5. Step 5: Solve for x
    x = 11,091,395,502.17/118,689.18
  6. Step 6: Final answer
    x = 93,449.09

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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.