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Finding the Fourth Proportional to 85,773.68, 128,690.80 and 26,624.24

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Solution

The fourth proportional to 85,773.68, 128,690.80 and 26,624.24 is: 39,945.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,773.68 : 128,690.80 = 26,624.24 : x
  2. Step 2: Convert to fraction form
    85,773.68/128,690.80 = 26,624.24/x
  3. Step 3: Cross multiply
    85,773.68x = 128,690.80 × 26,624.24
  4. Step 4: Simplify right side
    85,773.68x = 3,426,294,744.99
  5. Step 5: Solve for x
    x = 3,426,294,744.99/85,773.68
  6. Step 6: Final answer
    x = 39,945.76

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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.