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Finding the Fourth Proportional to 110,903.10, 166,063.05 and 81,159.90

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Solution

The fourth proportional to 110,903.10, 166,063.05 and 81,159.90 is: 121,526.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,903.10 : 166,063.05 = 81,159.90 : x
  2. Step 2: Convert to fraction form
    110,903.10/166,063.05 = 81,159.90/x
  3. Step 3: Cross multiply
    110,903.10x = 166,063.05 × 81,159.90
  4. Step 4: Simplify right side
    110,903.10x = 13,477,660,531.70
  5. Step 5: Solve for x
    x = 13,477,660,531.70/110,903.10
  6. Step 6: Final answer
    x = 121,526.45

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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.