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Finding the Fourth Proportional to 68,693.40, 103,586.66 and 67,756.63

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Solution

The fourth proportional to 68,693.40, 103,586.66 and 67,756.63 is: 102,174.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,693.40 : 103,586.66 = 67,756.63 : x
  2. Step 2: Convert to fraction form
    68,693.40/103,586.66 = 67,756.63/x
  3. Step 3: Cross multiply
    68,693.40x = 103,586.66 × 67,756.63
  4. Step 4: Simplify right side
    68,693.40x = 7,018,682,994.56
  5. Step 5: Solve for x
    x = 7,018,682,994.56/68,693.40
  6. Step 6: Final answer
    x = 102,174.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.