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Finding the Fourth Proportional to 65,359.60, 97,991.40 and 20,960.88

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Solution

The fourth proportional to 65,359.60, 97,991.40 and 20,960.88 is: 31,425.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,359.60 : 97,991.40 = 20,960.88 : x
  2. Step 2: Convert to fraction form
    65,359.60/97,991.40 = 20,960.88/x
  3. Step 3: Cross multiply
    65,359.60x = 97,991.40 × 20,960.88
  4. Step 4: Simplify right side
    65,359.60x = 2,053,985,976.43
  5. Step 5: Solve for x
    x = 2,053,985,976.43/65,359.60
  6. Step 6: Final answer
    x = 31,425.93

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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.