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Finding the Fourth Proportional to 43,661.79, 65,437.88 and 18,672.45

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Solution

The fourth proportional to 43,661.79, 65,437.88 and 18,672.45 is: 27,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,661.79 : 65,437.88 = 18,672.45 : x
  2. Step 2: Convert to fraction form
    43,661.79/65,437.88 = 18,672.45/x
  3. Step 3: Cross multiply
    43,661.79x = 65,437.88 × 18,672.45
  4. Step 4: Simplify right side
    43,661.79x = 1,221,885,215.22
  5. Step 5: Solve for x
    x = 1,221,885,215.22/43,661.79
  6. Step 6: Final answer
    x = 27,985.23

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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.