Home / 103,839.18-143,308.08-66,111

Finding the Fourth Proportional to 103,839.18, 143,308.08 and 66,111

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Solution

The fourth proportional to 103,839.18, 143,308.08 and 66,111 is: 91,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,839.18 : 143,308.08 = 66,111 : x
  2. Step 2: Convert to fraction form
    103,839.18/143,308.08 = 66,111/x
  3. Step 3: Cross multiply
    103,839.18x = 143,308.08 × 66,111
  4. Step 4: Simplify right side
    103,839.18x = 9,474,240,476.88
  5. Step 5: Solve for x
    x = 9,474,240,476.88/103,839.18
  6. Step 6: Final answer
    x = 91,239.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.