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Finding the Fourth Proportional to 64,810, 96,995.52 and 39,865.88

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Solution

The fourth proportional to 64,810, 96,995.52 and 39,865.88 is: 59,663.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,810 : 96,995.52 = 39,865.88 : x
  2. Step 2: Convert to fraction form
    64,810/96,995.52 = 39,865.88/x
  3. Step 3: Cross multiply
    64,810x = 96,995.52 × 39,865.88
  4. Step 4: Simplify right side
    64,810x = 3,866,811,760.86
  5. Step 5: Solve for x
    x = 3,866,811,760.86/64,810
  6. Step 6: Final answer
    x = 59,663.81

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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.