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Finding the Fourth Proportional to 79,805.66, 119,710.70 and 19,831.71

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Solution

The fourth proportional to 79,805.66, 119,710.70 and 19,831.71 is: 29,748.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,805.66 : 119,710.70 = 19,831.71 : x
  2. Step 2: Convert to fraction form
    79,805.66/119,710.70 = 19,831.71/x
  3. Step 3: Cross multiply
    79,805.66x = 119,710.70 × 19,831.71
  4. Step 4: Simplify right side
    79,805.66x = 2,374,067,886.30
  5. Step 5: Solve for x
    x = 2,374,067,886.30/79,805.66
  6. Step 6: Final answer
    x = 29,748.12

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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.