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Finding the Fourth Proportional to 58,387, 80,574.38 and 31,891

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Solution

The fourth proportional to 58,387, 80,574.38 and 31,891 is: 44,009.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,387 : 80,574.38 = 31,891 : x
  2. Step 2: Convert to fraction form
    58,387/80,574.38 = 31,891/x
  3. Step 3: Cross multiply
    58,387x = 80,574.38 × 31,891
  4. Step 4: Simplify right side
    58,387x = 2,569,597,552.58
  5. Step 5: Solve for x
    x = 2,569,597,552.58/58,387
  6. Step 6: Final answer
    x = 44,009.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.