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Finding the Fourth Proportional to 87,787.76, 120,334.42 and 86,606.48

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Solution

The fourth proportional to 87,787.76, 120,334.42 and 86,606.48 is: 118,715.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,787.76 : 120,334.42 = 86,606.48 : x
  2. Step 2: Convert to fraction form
    87,787.76/120,334.42 = 86,606.48/x
  3. Step 3: Cross multiply
    87,787.76x = 120,334.42 × 86,606.48
  4. Step 4: Simplify right side
    87,787.76x = 10,421,740,539.04
  5. Step 5: Solve for x
    x = 10,421,740,539.04/87,787.76
  6. Step 6: Final answer
    x = 118,715.19

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.