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Finding the Fourth Proportional to 64,121.78, 96,202.13 and 45,437.96

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Solution

The fourth proportional to 64,121.78, 96,202.13 and 45,437.96 is: 68,170.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,121.78 : 96,202.13 = 45,437.96 : x
  2. Step 2: Convert to fraction form
    64,121.78/96,202.13 = 45,437.96/x
  3. Step 3: Cross multiply
    64,121.78x = 96,202.13 × 45,437.96
  4. Step 4: Simplify right side
    64,121.78x = 4,371,228,803.76
  5. Step 5: Solve for x
    x = 4,371,228,803.76/64,121.78
  6. Step 6: Final answer
    x = 68,170.74

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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.