Home / 100,537.12-138,742.67-55,219.18

Finding the Fourth Proportional to 100,537.12, 138,742.67 and 55,219.18

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Solution

The fourth proportional to 100,537.12, 138,742.67 and 55,219.18 is: 76,203.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,537.12 : 138,742.67 = 55,219.18 : x
  2. Step 2: Convert to fraction form
    100,537.12/138,742.67 = 55,219.18/x
  3. Step 3: Cross multiply
    100,537.12x = 138,742.67 × 55,219.18
  4. Step 4: Simplify right side
    100,537.12x = 7,661,255,774.70
  5. Step 5: Solve for x
    x = 7,661,255,774.70/100,537.12
  6. Step 6: Final answer
    x = 76,203.25

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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.