Home / 100,821.64-139,119.72-66,777.34

Finding the Fourth Proportional to 100,821.64, 139,119.72 and 66,777.34

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Solution

The fourth proportional to 100,821.64, 139,119.72 and 66,777.34 is: 92,143.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,821.64 : 139,119.72 = 66,777.34 : x
  2. Step 2: Convert to fraction form
    100,821.64/139,119.72 = 66,777.34/x
  3. Step 3: Cross multiply
    100,821.64x = 139,119.72 × 66,777.34
  4. Step 4: Simplify right side
    100,821.64x = 9,290,044,843.14
  5. Step 5: Solve for x
    x = 9,290,044,843.14/100,821.64
  6. Step 6: Final answer
    x = 92,143.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.