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Finding the Fourth Proportional to 85,868.84, 128,825.24 and 26,705.03

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Solution

The fourth proportional to 85,868.84, 128,825.24 and 26,705.03 is: 40,064.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,868.84 : 128,825.24 = 26,705.03 : x
  2. Step 2: Convert to fraction form
    85,868.84/128,825.24 = 26,705.03/x
  3. Step 3: Cross multiply
    85,868.84x = 128,825.24 × 26,705.03
  4. Step 4: Simplify right side
    85,868.84x = 3,440,281,121.31
  5. Step 5: Solve for x
    x = 3,440,281,121.31/85,868.84
  6. Step 6: Final answer
    x = 40,064.37

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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.