Home / 85,921.88-128,844.76-45,931.18

Finding the Fourth Proportional to 85,921.88, 128,844.76 and 45,931.18

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Solution

The fourth proportional to 85,921.88, 128,844.76 and 45,931.18 is: 68,876.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,921.88 : 128,844.76 = 45,931.18 : x
  2. Step 2: Convert to fraction form
    85,921.88/128,844.76 = 45,931.18/x
  3. Step 3: Cross multiply
    85,921.88x = 128,844.76 × 45,931.18
  4. Step 4: Simplify right side
    85,921.88x = 5,917,991,219.39
  5. Step 5: Solve for x
    x = 5,917,991,219.39/85,921.88
  6. Step 6: Final answer
    x = 68,876.42

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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.