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Finding the Fourth Proportional to 85,042.65, 117,375.11 and 56,311.64

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Solution

The fourth proportional to 85,042.65, 117,375.11 and 56,311.64 is: 77,720.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,042.65 : 117,375.11 = 56,311.64 : x
  2. Step 2: Convert to fraction form
    85,042.65/117,375.11 = 56,311.64/x
  3. Step 3: Cross multiply
    85,042.65x = 117,375.11 × 56,311.64
  4. Step 4: Simplify right side
    85,042.65x = 6,609,584,070.85
  5. Step 5: Solve for x
    x = 6,609,584,070.85/85,042.65
  6. Step 6: Final answer
    x = 77,720.82

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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.