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Finding the Fourth Proportional to 68,991.68, 95,191.64 and 42,124.40

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Solution

The fourth proportional to 68,991.68, 95,191.64 and 42,124.40 is: 58,121.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,991.68 : 95,191.64 = 42,124.40 : x
  2. Step 2: Convert to fraction form
    68,991.68/95,191.64 = 42,124.40/x
  3. Step 3: Cross multiply
    68,991.68x = 95,191.64 × 42,124.40
  4. Step 4: Simplify right side
    68,991.68x = 4,009,890,720.02
  5. Step 5: Solve for x
    x = 4,009,890,720.02/68,991.68
  6. Step 6: Final answer
    x = 58,121.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.