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Finding the Fourth Proportional to 97,787.31, 135,057.54 and 65,900.85

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Solution

The fourth proportional to 97,787.31, 135,057.54 and 65,900.85 is: 91,018.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,787.31 : 135,057.54 = 65,900.85 : x
  2. Step 2: Convert to fraction form
    97,787.31/135,057.54 = 65,900.85/x
  3. Step 3: Cross multiply
    97,787.31x = 135,057.54 × 65,900.85
  4. Step 4: Simplify right side
    97,787.31x = 8,900,406,684.91
  5. Step 5: Solve for x
    x = 8,900,406,684.91/97,787.31
  6. Step 6: Final answer
    x = 91,018.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.