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Finding the Fourth Proportional to 117,191.64, 175,487.16 and 81,118.08

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Solution

The fourth proportional to 117,191.64, 175,487.16 and 81,118.08 is: 121,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,191.64 : 175,487.16 = 81,118.08 : x
  2. Step 2: Convert to fraction form
    117,191.64/175,487.16 = 81,118.08/x
  3. Step 3: Cross multiply
    117,191.64x = 175,487.16 × 81,118.08
  4. Step 4: Simplify right side
    117,191.64x = 14,235,181,483.85
  5. Step 5: Solve for x
    x = 14,235,181,483.85/117,191.64
  6. Step 6: Final answer
    x = 121,469.26

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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.