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Finding the Fourth Proportional to 87,343.58, 131,080.48 and 64,905.98

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Solution

The fourth proportional to 87,343.58, 131,080.48 and 64,905.98 is: 97,407.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,343.58 : 131,080.48 = 64,905.98 : x
  2. Step 2: Convert to fraction form
    87,343.58/131,080.48 = 64,905.98/x
  3. Step 3: Cross multiply
    87,343.58x = 131,080.48 × 64,905.98
  4. Step 4: Simplify right side
    87,343.58x = 8,507,906,195.60
  5. Step 5: Solve for x
    x = 8,507,906,195.60/87,343.58
  6. Step 6: Final answer
    x = 97,407.34

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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.