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Finding the Fourth Proportional to 70,812.12, 105,576.14 and 68,965.32

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Solution

The fourth proportional to 70,812.12, 105,576.14 and 68,965.32 is: 102,822.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,812.12 : 105,576.14 = 68,965.32 : x
  2. Step 2: Convert to fraction form
    70,812.12/105,576.14 = 68,965.32/x
  3. Step 3: Cross multiply
    70,812.12x = 105,576.14 × 68,965.32
  4. Step 4: Simplify right side
    70,812.12x = 7,281,092,279.46
  5. Step 5: Solve for x
    x = 7,281,092,279.46/70,812.12
  6. Step 6: Final answer
    x = 102,822.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.