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Finding the Fourth Proportional to 70,080.90, 105,109.98 and 20,149.62

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Solution

The fourth proportional to 70,080.90, 105,109.98 and 20,149.62 is: 30,221.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,080.90 : 105,109.98 = 20,149.62 : x
  2. Step 2: Convert to fraction form
    70,080.90/105,109.98 = 20,149.62/x
  3. Step 3: Cross multiply
    70,080.90x = 105,109.98 × 20,149.62
  4. Step 4: Simplify right side
    70,080.90x = 2,117,926,155.21
  5. Step 5: Solve for x
    x = 2,117,926,155.21/70,080.90
  6. Step 6: Final answer
    x = 30,221.16

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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.