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Finding the Fourth Proportional to 72,394.96, 99,904.08 and 40,564.48

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Solution

The fourth proportional to 72,394.96, 99,904.08 and 40,564.48 is: 55,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,394.96 : 99,904.08 = 40,564.48 : x
  2. Step 2: Convert to fraction form
    72,394.96/99,904.08 = 40,564.48/x
  3. Step 3: Cross multiply
    72,394.96x = 99,904.08 × 40,564.48
  4. Step 4: Simplify right side
    72,394.96x = 4,052,557,055.08
  5. Step 5: Solve for x
    x = 4,052,557,055.08/72,394.96
  6. Step 6: Final answer
    x = 55,978.44

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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.