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Finding the Fourth Proportional to 72,657.68, 108,991.13 and 19,348.79

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Solution

The fourth proportional to 72,657.68, 108,991.13 and 19,348.79 is: 29,024.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,657.68 : 108,991.13 = 19,348.79 : x
  2. Step 2: Convert to fraction form
    72,657.68/108,991.13 = 19,348.79/x
  3. Step 3: Cross multiply
    72,657.68x = 108,991.13 × 19,348.79
  4. Step 4: Simplify right side
    72,657.68x = 2,108,845,844.53
  5. Step 5: Solve for x
    x = 2,108,845,844.53/72,657.68
  6. Step 6: Final answer
    x = 29,024.41

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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.