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Finding the Fourth Proportional to 110,689.50, 166,147.24 and 81,019.20

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Solution

The fourth proportional to 110,689.50, 166,147.24 and 81,019.20 is: 121,611.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,689.50 : 166,147.24 = 81,019.20 : x
  2. Step 2: Convert to fraction form
    110,689.50/166,147.24 = 81,019.20/x
  3. Step 3: Cross multiply
    110,689.50x = 166,147.24 × 81,019.20
  4. Step 4: Simplify right side
    110,689.50x = 13,461,116,467.01
  5. Step 5: Solve for x
    x = 13,461,116,467.01/110,689.50
  6. Step 6: Final answer
    x = 121,611.50

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1.5x scale

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.