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Finding the Fourth Proportional to 70,983.96, 106,294.08 and 68,881.68

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Solution

The fourth proportional to 70,983.96, 106,294.08 and 68,881.68 is: 103,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,983.96 : 106,294.08 = 68,881.68 : x
  2. Step 2: Convert to fraction form
    70,983.96/106,294.08 = 68,881.68/x
  3. Step 3: Cross multiply
    70,983.96x = 106,294.08 × 68,881.68
  4. Step 4: Simplify right side
    70,983.96x = 7,321,714,804.45
  5. Step 5: Solve for x
    x = 7,321,714,804.45/70,983.96
  6. Step 6: Final answer
    x = 103,146.05

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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.