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Finding the Fourth Proportional to 64,663.47, 96,999.30 and 20,291.97

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Solution

The fourth proportional to 64,663.47, 96,999.30 and 20,291.97 is: 30,439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,663.47 : 96,999.30 = 20,291.97 : x
  2. Step 2: Convert to fraction form
    64,663.47/96,999.30 = 20,291.97/x
  3. Step 3: Cross multiply
    64,663.47x = 96,999.30 × 20,291.97
  4. Step 4: Simplify right side
    64,663.47x = 1,968,307,325.46
  5. Step 5: Solve for x
    x = 1,968,307,325.46/64,663.47
  6. Step 6: Final answer
    x = 30,439.25

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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.