Home / 72,781.98-109,172.36-20,191.46

Finding the Fourth Proportional to 72,781.98, 109,172.36 and 20,191.46

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Solution

The fourth proportional to 72,781.98, 109,172.36 and 20,191.46 is: 30,287.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,781.98 : 109,172.36 = 20,191.46 : x
  2. Step 2: Convert to fraction form
    72,781.98/109,172.36 = 20,191.46/x
  3. Step 3: Cross multiply
    72,781.98x = 109,172.36 × 20,191.46
  4. Step 4: Simplify right side
    72,781.98x = 2,204,348,693.23
  5. Step 5: Solve for x
    x = 2,204,348,693.23/72,781.98
  6. Step 6: Final answer
    x = 30,287.01

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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.