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Finding the Fourth Proportional to 107,477.80, 161,216.70 and 68,079.40

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Solution

The fourth proportional to 107,477.80, 161,216.70 and 68,079.40 is: 102,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,477.80 : 161,216.70 = 68,079.40 : x
  2. Step 2: Convert to fraction form
    107,477.80/161,216.70 = 68,079.40/x
  3. Step 3: Cross multiply
    107,477.80x = 161,216.70 × 68,079.40
  4. Step 4: Simplify right side
    107,477.80x = 10,975,536,205.98
  5. Step 5: Solve for x
    x = 10,975,536,205.98/107,477.80
  6. Step 6: Final answer
    x = 102,119.10

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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.