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Finding the Fourth Proportional to 57,809.40, 86,712.88 and 26,644.64

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Solution

The fourth proportional to 57,809.40, 86,712.88 and 26,644.64 is: 39,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,809.40 : 86,712.88 = 26,644.64 : x
  2. Step 2: Convert to fraction form
    57,809.40/86,712.88 = 26,644.64/x
  3. Step 3: Cross multiply
    57,809.40x = 86,712.88 × 26,644.64
  4. Step 4: Simplify right side
    57,809.40x = 2,310,433,470.96
  5. Step 5: Solve for x
    x = 2,310,433,470.96/57,809.40
  6. Step 6: Final answer
    x = 39,966.40

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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.