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Finding the Fourth Proportional to 43,240.80, 64,810.80 and 19,869.60

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Solution

The fourth proportional to 43,240.80, 64,810.80 and 19,869.60 is: 29,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,240.80 : 64,810.80 = 19,869.60 : x
  2. Step 2: Convert to fraction form
    43,240.80/64,810.80 = 19,869.60/x
  3. Step 3: Cross multiply
    43,240.80x = 64,810.80 × 19,869.60
  4. Step 4: Simplify right side
    43,240.80x = 1,287,764,671.68
  5. Step 5: Solve for x
    x = 1,287,764,671.68/43,240.80
  6. Step 6: Final answer
    x = 29,781.24

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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.