Home / 100,140.41-138,193.94-54,818.42

Finding the Fourth Proportional to 100,140.41, 138,193.94 and 54,818.42

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Solution

The fourth proportional to 100,140.41, 138,193.94 and 54,818.42 is: 75,649.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,140.41 : 138,193.94 = 54,818.42 : x
  2. Step 2: Convert to fraction form
    100,140.41/138,193.94 = 54,818.42/x
  3. Step 3: Cross multiply
    100,140.41x = 138,193.94 × 54,818.42
  4. Step 4: Simplify right side
    100,140.41x = 7,575,573,170.28
  5. Step 5: Solve for x
    x = 7,575,573,170.28/100,140.41
  6. Step 6: Final answer
    x = 75,649.52

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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.