Home / 67,172.16-100,723.44-19,781.07

Finding the Fourth Proportional to 67,172.16, 100,723.44 and 19,781.07

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Solution

The fourth proportional to 67,172.16, 100,723.44 and 19,781.07 is: 29,661.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,172.16 : 100,723.44 = 19,781.07 : x
  2. Step 2: Convert to fraction form
    67,172.16/100,723.44 = 19,781.07/x
  3. Step 3: Cross multiply
    67,172.16x = 100,723.44 × 19,781.07
  4. Step 4: Simplify right side
    67,172.16x = 1,992,417,417.28
  5. Step 5: Solve for x
    x = 1,992,417,417.28/67,172.16
  6. Step 6: Final answer
    x = 29,661.36

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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.