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Finding the Fourth Proportional to 85,891.96, 118,586.57 and 55,278.77

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Solution

The fourth proportional to 85,891.96, 118,586.57 and 55,278.77 is: 76,320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,891.96 : 118,586.57 = 55,278.77 : x
  2. Step 2: Convert to fraction form
    85,891.96/118,586.57 = 55,278.77/x
  3. Step 3: Cross multiply
    85,891.96x = 118,586.57 × 55,278.77
  4. Step 4: Simplify right side
    85,891.96x = 6,555,318,858.79
  5. Step 5: Solve for x
    x = 6,555,318,858.79/85,891.96
  6. Step 6: Final answer
    x = 76,320.52

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Double scale
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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.