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Finding the Fourth Proportional to 64,699.97, 97,059.75 and 20,322.55

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Solution

The fourth proportional to 64,699.97, 97,059.75 and 20,322.55 is: 30,486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,699.97 : 97,059.75 = 20,322.55 : x
  2. Step 2: Convert to fraction form
    64,699.97/97,059.75 = 20,322.55/x
  3. Step 3: Cross multiply
    64,699.97x = 97,059.75 × 20,322.55
  4. Step 4: Simplify right side
    64,699.97x = 1,972,501,379.71
  5. Step 5: Solve for x
    x = 1,972,501,379.71/64,699.97
  6. Step 6: Final answer
    x = 30,486.90

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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.