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Finding the Fourth Proportional to 70,250.79, 105,450.45 and 68,664.30

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Solution

The fourth proportional to 70,250.79, 105,450.45 and 68,664.30 is: 103,069.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,250.79 : 105,450.45 = 68,664.30 : x
  2. Step 2: Convert to fraction form
    70,250.79/105,450.45 = 68,664.30/x
  3. Step 3: Cross multiply
    70,250.79x = 105,450.45 × 68,664.30
  4. Step 4: Simplify right side
    70,250.79x = 7,240,681,333.94
  5. Step 5: Solve for x
    x = 7,240,681,333.94/70,250.79
  6. Step 6: Final answer
    x = 103,069.04

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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.