Home / 100,347.12-138,480.60-55,029.24

Finding the Fourth Proportional to 100,347.12, 138,480.60 and 55,029.24

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Solution

The fourth proportional to 100,347.12, 138,480.60 and 55,029.24 is: 75,941.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,347.12 : 138,480.60 = 55,029.24 : x
  2. Step 2: Convert to fraction form
    100,347.12/138,480.60 = 55,029.24/x
  3. Step 3: Cross multiply
    100,347.12x = 138,480.60 × 55,029.24
  4. Step 4: Simplify right side
    100,347.12x = 7,620,482,172.74
  5. Step 5: Solve for x
    x = 7,620,482,172.74/100,347.12
  6. Step 6: Final answer
    x = 75,941.21

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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.