Home / 85,921.44-128,877.03-26,748.78

Finding the Fourth Proportional to 85,921.44, 128,877.03 and 26,748.78

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Solution

The fourth proportional to 85,921.44, 128,877.03 and 26,748.78 is: 40,121.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,921.44 : 128,877.03 = 26,748.78 : x
  2. Step 2: Convert to fraction form
    85,921.44/128,877.03 = 26,748.78/x
  3. Step 3: Cross multiply
    85,921.44x = 128,877.03 × 26,748.78
  4. Step 4: Simplify right side
    85,921.44x = 3,447,303,322.52
  5. Step 5: Solve for x
    x = 3,447,303,322.52/85,921.44
  6. Step 6: Final answer
    x = 40,121.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.