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Finding the Fourth Proportional to 43,888.68, 65,839.50 and 12,719.88

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Solution

The fourth proportional to 43,888.68, 65,839.50 and 12,719.88 is: 19,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,888.68 : 65,839.50 = 12,719.88 : x
  2. Step 2: Convert to fraction form
    43,888.68/65,839.50 = 12,719.88/x
  3. Step 3: Cross multiply
    43,888.68x = 65,839.50 × 12,719.88
  4. Step 4: Simplify right side
    43,888.68x = 837,470,539.26
  5. Step 5: Solve for x
    x = 837,470,539.26/43,888.68
  6. Step 6: Final answer
    x = 19,081.70

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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.