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Finding the Fourth Proportional to 110,541.20, 165,811.80 and 90,858.20

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Solution

The fourth proportional to 110,541.20, 165,811.80 and 90,858.20 is: 136,287.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,541.20 : 165,811.80 = 90,858.20 : x
  2. Step 2: Convert to fraction form
    110,541.20/165,811.80 = 90,858.20/x
  3. Step 3: Cross multiply
    110,541.20x = 165,811.80 × 90,858.20
  4. Step 4: Simplify right side
    110,541.20x = 15,065,361,686.76
  5. Step 5: Solve for x
    x = 15,065,361,686.76/110,541.20
  6. Step 6: Final answer
    x = 136,287.30

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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.