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Finding the Fourth Proportional to 85,809.96, 128,759.81 and 62,311.59

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Solution

The fourth proportional to 85,809.96, 128,759.81 and 62,311.59 is: 93,499.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,809.96 : 128,759.81 = 62,311.59 : x
  2. Step 2: Convert to fraction form
    85,809.96/128,759.81 = 62,311.59/x
  3. Step 3: Cross multiply
    85,809.96x = 128,759.81 × 62,311.59
  4. Step 4: Simplify right side
    85,809.96x = 8,023,228,177.64
  5. Step 5: Solve for x
    x = 8,023,228,177.64/85,809.96
  6. Step 6: Final answer
    x = 93,499.96

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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.