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Finding the Fourth Proportional to 70,838.80, 106,315.80 and 68,534.80

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Solution

The fourth proportional to 70,838.80, 106,315.80 and 68,534.80 is: 102,857.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,838.80 : 106,315.80 = 68,534.80 : x
  2. Step 2: Convert to fraction form
    70,838.80/106,315.80 = 68,534.80/x
  3. Step 3: Cross multiply
    70,838.80x = 106,315.80 × 68,534.80
  4. Step 4: Simplify right side
    70,838.80x = 7,286,332,089.84
  5. Step 5: Solve for x
    x = 7,286,332,089.84/70,838.80
  6. Step 6: Final answer
    x = 102,857.93

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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.