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Finding the Fourth Proportional to 85,672.90, 118,290.98 and 68,770.13

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Solution

The fourth proportional to 85,672.90, 118,290.98 and 68,770.13 is: 94,952.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,672.90 : 118,290.98 = 68,770.13 : x
  2. Step 2: Convert to fraction form
    85,672.90/118,290.98 = 68,770.13/x
  3. Step 3: Cross multiply
    85,672.90x = 118,290.98 × 68,770.13
  4. Step 4: Simplify right side
    85,672.90x = 8,134,886,072.43
  5. Step 5: Solve for x
    x = 8,134,886,072.43/85,672.90
  6. Step 6: Final answer
    x = 94,952.85

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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.