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Finding the Fourth Proportional to 64,379.99, 88,811.36 and 38,872.28

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Solution

The fourth proportional to 64,379.99, 88,811.36 and 38,872.28 is: 53,623.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,379.99 : 88,811.36 = 38,872.28 : x
  2. Step 2: Convert to fraction form
    64,379.99/88,811.36 = 38,872.28/x
  3. Step 3: Cross multiply
    64,379.99x = 88,811.36 × 38,872.28
  4. Step 4: Simplify right side
    64,379.99x = 3,452,300,053.10
  5. Step 5: Solve for x
    x = 3,452,300,053.10/64,379.99
  6. Step 6: Final answer
    x = 53,623.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.