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Finding the Fourth Proportional to 117,117.80, 161,621.22 and 63,401.64

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Solution

The fourth proportional to 117,117.80, 161,621.22 and 63,401.64 is: 87,493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,117.80 : 161,621.22 = 63,401.64 : x
  2. Step 2: Convert to fraction form
    117,117.80/161,621.22 = 63,401.64/x
  3. Step 3: Cross multiply
    117,117.80x = 161,621.22 × 63,401.64
  4. Step 4: Simplify right side
    117,117.80x = 10,247,050,406.80
  5. Step 5: Solve for x
    x = 10,247,050,406.80/117,117.80
  6. Step 6: Final answer
    x = 87,493.54

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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.