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Finding the Fourth Proportional to 110,109.20, 165,090.90 and 39,979.40

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Solution

The fourth proportional to 110,109.20, 165,090.90 and 39,979.40 is: 59,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,109.20 : 165,090.90 = 39,979.40 : x
  2. Step 2: Convert to fraction form
    110,109.20/165,090.90 = 39,979.40/x
  3. Step 3: Cross multiply
    110,109.20x = 165,090.90 × 39,979.40
  4. Step 4: Simplify right side
    110,109.20x = 6,600,235,127.46
  5. Step 5: Solve for x
    x = 6,600,235,127.46/110,109.20
  6. Step 6: Final answer
    x = 59,942.63

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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.