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Finding the Fourth Proportional to 61,470.80, 92,206.20 and 19,917.80

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Solution

The fourth proportional to 61,470.80, 92,206.20 and 19,917.80 is: 29,876.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,470.80 : 92,206.20 = 19,917.80 : x
  2. Step 2: Convert to fraction form
    61,470.80/92,206.20 = 19,917.80/x
  3. Step 3: Cross multiply
    61,470.80x = 92,206.20 × 19,917.80
  4. Step 4: Simplify right side
    61,470.80x = 1,836,544,650.36
  5. Step 5: Solve for x
    x = 1,836,544,650.36/61,470.80
  6. Step 6: Final answer
    x = 29,876.70

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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.