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Finding the Fourth Proportional to 85,765.67, 128,683.74 and 35,856.31

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Solution

The fourth proportional to 85,765.67, 128,683.74 and 35,856.31 is: 53,799.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,765.67 : 128,683.74 = 35,856.31 : x
  2. Step 2: Convert to fraction form
    85,765.67/128,683.74 = 35,856.31/x
  3. Step 3: Cross multiply
    85,765.67x = 128,683.74 × 35,856.31
  4. Step 4: Simplify right side
    85,765.67x = 4,614,123,429.98
  5. Step 5: Solve for x
    x = 4,614,123,429.98/85,765.67
  6. Step 6: Final answer
    x = 53,799.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.