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Finding the Fourth Proportional to 85,881.62, 128,822.43 and 26,721.02

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Solution

The fourth proportional to 85,881.62, 128,822.43 and 26,721.02 is: 40,081.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,881.62 : 128,822.43 = 26,721.02 : x
  2. Step 2: Convert to fraction form
    85,881.62/128,822.43 = 26,721.02/x
  3. Step 3: Cross multiply
    85,881.62x = 128,822.43 × 26,721.02
  4. Step 4: Simplify right side
    85,881.62x = 3,442,266,728.48
  5. Step 5: Solve for x
    x = 3,442,266,728.48/85,881.62
  6. Step 6: Final answer
    x = 40,081.53

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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.