Home / 100,633.21-138,877.01-55,314.70

Finding the Fourth Proportional to 100,633.21, 138,877.01 and 55,314.70

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Solution

The fourth proportional to 100,633.21, 138,877.01 and 55,314.70 is: 76,336.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,633.21 : 138,877.01 = 55,314.70 : x
  2. Step 2: Convert to fraction form
    100,633.21/138,877.01 = 55,314.70/x
  3. Step 3: Cross multiply
    100,633.21x = 138,877.01 × 55,314.70
  4. Step 4: Simplify right side
    100,633.21x = 7,681,939,573.14
  5. Step 5: Solve for x
    x = 7,681,939,573.14/100,633.21
  6. Step 6: Final answer
    x = 76,336.03

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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.