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Finding the Fourth Proportional to 66,719.40, 100,232.70 and 64,108.20

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Solution

The fourth proportional to 66,719.40, 100,232.70 and 64,108.20 is: 96,309.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,719.40 : 100,232.70 = 64,108.20 : x
  2. Step 2: Convert to fraction form
    66,719.40/100,232.70 = 64,108.20/x
  3. Step 3: Cross multiply
    66,719.40x = 100,232.70 × 64,108.20
  4. Step 4: Simplify right side
    66,719.40x = 6,425,737,978.14
  5. Step 5: Solve for x
    x = 6,425,737,978.14/66,719.40
  6. Step 6: Final answer
    x = 96,309.89

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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.