Home / 110,017.20-165,090.60-72,685.20

Finding the Fourth Proportional to 110,017.20, 165,090.60 and 72,685.20

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Solution

The fourth proportional to 110,017.20, 165,090.60 and 72,685.20 is: 109,070.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,017.20 : 165,090.60 = 72,685.20 : x
  2. Step 2: Convert to fraction form
    110,017.20/165,090.60 = 72,685.20/x
  3. Step 3: Cross multiply
    110,017.20x = 165,090.60 × 72,685.20
  4. Step 4: Simplify right side
    110,017.20x = 11,999,643,279.12
  5. Step 5: Solve for x
    x = 11,999,643,279.12/110,017.20
  6. Step 6: Final answer
    x = 109,070.61

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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.