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Finding the Fourth Proportional to 72,501.23, 108,751.65 and 19,910.77

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Solution

The fourth proportional to 72,501.23, 108,751.65 and 19,910.77 is: 29,866.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,501.23 : 108,751.65 = 19,910.77 : x
  2. Step 2: Convert to fraction form
    72,501.23/108,751.65 = 19,910.77/x
  3. Step 3: Cross multiply
    72,501.23x = 108,751.65 × 19,910.77
  4. Step 4: Simplify right side
    72,501.23x = 2,165,328,743.73
  5. Step 5: Solve for x
    x = 2,165,328,743.73/72,501.23
  6. Step 6: Final answer
    x = 29,866.10

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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.