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Finding the Fourth Proportional to 43,902.40, 65,810.40 and 21,719.20

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Solution

The fourth proportional to 43,902.40, 65,810.40 and 21,719.20 is: 32,557.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,902.40 : 65,810.40 = 21,719.20 : x
  2. Step 2: Convert to fraction form
    43,902.40/65,810.40 = 21,719.20/x
  3. Step 3: Cross multiply
    43,902.40x = 65,810.40 × 21,719.20
  4. Step 4: Simplify right side
    43,902.40x = 1,429,349,239.68
  5. Step 5: Solve for x
    x = 1,429,349,239.68/43,902.40
  6. Step 6: Final answer
    x = 32,557.43

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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.