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Finding the Fourth Proportional to 72,876.51, 109,306.06 and 19,572.54

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Solution

The fourth proportional to 72,876.51, 109,306.06 and 19,572.54 is: 29,356.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,876.51 : 109,306.06 = 19,572.54 : x
  2. Step 2: Convert to fraction form
    72,876.51/109,306.06 = 19,572.54/x
  3. Step 3: Cross multiply
    72,876.51x = 109,306.06 × 19,572.54
  4. Step 4: Simplify right side
    72,876.51x = 2,139,396,772.76
  5. Step 5: Solve for x
    x = 2,139,396,772.76/72,876.51
  6. Step 6: Final answer
    x = 29,356.47

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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.