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Finding the Fourth Proportional to 85,758.74, 128,650.56 and 26,599.17

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Solution

The fourth proportional to 85,758.74, 128,650.56 and 26,599.17 is: 39,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,758.74 : 128,650.56 = 26,599.17 : x
  2. Step 2: Convert to fraction form
    85,758.74/128,650.56 = 26,599.17/x
  3. Step 3: Cross multiply
    85,758.74x = 128,650.56 × 26,599.17
  4. Step 4: Simplify right side
    85,758.74x = 3,421,997,983.04
  5. Step 5: Solve for x
    x = 3,421,997,983.04/85,758.74
  6. Step 6: Final answer
    x = 39,902.62

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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.