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Finding the Fourth Proportional to 72,645.54, 108,968.15 and 19,337.53

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Solution

The fourth proportional to 72,645.54, 108,968.15 and 19,337.53 is: 29,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,645.54 : 108,968.15 = 19,337.53 : x
  2. Step 2: Convert to fraction form
    72,645.54/108,968.15 = 19,337.53/x
  3. Step 3: Cross multiply
    72,645.54x = 108,968.15 × 19,337.53
  4. Step 4: Simplify right side
    72,645.54x = 2,107,174,869.67
  5. Step 5: Solve for x
    x = 2,107,174,869.67/72,645.54
  6. Step 6: Final answer
    x = 29,006.25

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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.