Home / 100,729.08-138,997.56-58,290.24

Finding the Fourth Proportional to 100,729.08, 138,997.56 and 58,290.24

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Solution

The fourth proportional to 100,729.08, 138,997.56 and 58,290.24 is: 80,435.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,729.08 : 138,997.56 = 58,290.24 : x
  2. Step 2: Convert to fraction form
    100,729.08/138,997.56 = 58,290.24/x
  3. Step 3: Cross multiply
    100,729.08x = 138,997.56 × 58,290.24
  4. Step 4: Simplify right side
    100,729.08x = 8,102,201,131.81
  5. Step 5: Solve for x
    x = 8,102,201,131.81/100,729.08
  6. Step 6: Final answer
    x = 80,435.57

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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.