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Finding the Fourth Proportional to 72,403.38, 108,605.16 and 19,813.32

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Solution

The fourth proportional to 72,403.38, 108,605.16 and 19,813.32 is: 29,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.38 : 108,605.16 = 19,813.32 : x
  2. Step 2: Convert to fraction form
    72,403.38/108,605.16 = 19,813.32/x
  3. Step 3: Cross multiply
    72,403.38x = 108,605.16 × 19,813.32
  4. Step 4: Simplify right side
    72,403.38x = 2,151,828,788.73
  5. Step 5: Solve for x
    x = 2,151,828,788.73/72,403.38
  6. Step 6: Final answer
    x = 29,720.00

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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.