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Finding the Fourth Proportional to 70,340.49, 105,395.70 and 67,716.09

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Solution

The fourth proportional to 70,340.49, 105,395.70 and 67,716.09 is: 101,463.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,340.49 : 105,395.70 = 67,716.09 : x
  2. Step 2: Convert to fraction form
    70,340.49/105,395.70 = 67,716.09/x
  3. Step 3: Cross multiply
    70,340.49x = 105,395.70 × 67,716.09
  4. Step 4: Simplify right side
    70,340.49x = 7,136,984,706.81
  5. Step 5: Solve for x
    x = 7,136,984,706.81/70,340.49
  6. Step 6: Final answer
    x = 101,463.39

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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.