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Finding the Fourth Proportional to 118,508.50, 163,541.82 and 68,207.50

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Solution

The fourth proportional to 118,508.50, 163,541.82 and 68,207.50 is: 94,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,508.50 : 163,541.82 = 68,207.50 : x
  2. Step 2: Convert to fraction form
    118,508.50/163,541.82 = 68,207.50/x
  3. Step 3: Cross multiply
    118,508.50x = 163,541.82 × 68,207.50
  4. Step 4: Simplify right side
    118,508.50x = 11,154,778,687.65
  5. Step 5: Solve for x
    x = 11,154,778,687.65/118,508.50
  6. Step 6: Final answer
    x = 94,126.40

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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.