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Finding the Fourth Proportional to 73,139.36, 100,932.32 and 39,605.36

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Solution

The fourth proportional to 73,139.36, 100,932.32 and 39,605.36 is: 54,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.36 : 100,932.32 = 39,605.36 : x
  2. Step 2: Convert to fraction form
    73,139.36/100,932.32 = 39,605.36/x
  3. Step 3: Cross multiply
    73,139.36x = 100,932.32 × 39,605.36
  4. Step 4: Simplify right side
    73,139.36x = 3,997,460,869.24
  5. Step 5: Solve for x
    x = 3,997,460,869.24/73,139.36
  6. Step 6: Final answer
    x = 54,655.40

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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.