Home / 100,629.90-138,871.86-58,191.12

Finding the Fourth Proportional to 100,629.90, 138,871.86 and 58,191.12

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Solution

The fourth proportional to 100,629.90, 138,871.86 and 58,191.12 is: 80,305.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,629.90 : 138,871.86 = 58,191.12 : x
  2. Step 2: Convert to fraction form
    100,629.90/138,871.86 = 58,191.12/x
  3. Step 3: Cross multiply
    100,629.90x = 138,871.86 × 58,191.12
  4. Step 4: Simplify right side
    100,629.90x = 8,081,109,069.88
  5. Step 5: Solve for x
    x = 8,081,109,069.88/100,629.90
  6. Step 6: Final answer
    x = 80,305.25

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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.