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Finding the Fourth Proportional to 72,386.87, 108,563.90 and 19,800.45

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Solution

The fourth proportional to 72,386.87, 108,563.90 and 19,800.45 is: 29,696.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,386.87 : 108,563.90 = 19,800.45 : x
  2. Step 2: Convert to fraction form
    72,386.87/108,563.90 = 19,800.45/x
  3. Step 3: Cross multiply
    72,386.87x = 108,563.90 × 19,800.45
  4. Step 4: Simplify right side
    72,386.87x = 2,149,613,974.75
  5. Step 5: Solve for x
    x = 2,149,613,974.75/72,386.87
  6. Step 6: Final answer
    x = 29,696.19

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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.