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Finding the Fourth Proportional to 61,385.60, 92,022.08 and 19,811.20

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Solution

The fourth proportional to 61,385.60, 92,022.08 and 19,811.20 is: 29,698.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,385.60 : 92,022.08 = 19,811.20 : x
  2. Step 2: Convert to fraction form
    61,385.60/92,022.08 = 19,811.20/x
  3. Step 3: Cross multiply
    61,385.60x = 92,022.08 × 19,811.20
  4. Step 4: Simplify right side
    61,385.60x = 1,823,067,831.30
  5. Step 5: Solve for x
    x = 1,823,067,831.30/61,385.60
  6. Step 6: Final answer
    x = 29,698.62

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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.