Home / 100,347.12-138,418.20-66,355.44

Finding the Fourth Proportional to 100,347.12, 138,418.20 and 66,355.44

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Solution

The fourth proportional to 100,347.12, 138,418.20 and 66,355.44 is: 91,530.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,347.12 : 138,418.20 = 66,355.44 : x
  2. Step 2: Convert to fraction form
    100,347.12/138,418.20 = 66,355.44/x
  3. Step 3: Cross multiply
    100,347.12x = 138,418.20 × 66,355.44
  4. Step 4: Simplify right side
    100,347.12x = 9,184,800,565.01
  5. Step 5: Solve for x
    x = 9,184,800,565.01/100,347.12
  6. Step 6: Final answer
    x = 91,530.29

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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.