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Finding the Fourth Proportional to 71,670.51, 107,491.33 and 68,113.90

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Solution

The fourth proportional to 71,670.51, 107,491.33 and 68,113.90 is: 102,157.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,670.51 : 107,491.33 = 68,113.90 : x
  2. Step 2: Convert to fraction form
    71,670.51/107,491.33 = 68,113.90/x
  3. Step 3: Cross multiply
    71,670.51x = 107,491.33 × 68,113.90
  4. Step 4: Simplify right side
    71,670.51x = 7,321,653,702.49
  5. Step 5: Solve for x
    x = 7,321,653,702.49/71,670.51
  6. Step 6: Final answer
    x = 102,157.13

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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.