Home / 185,315.78-255,728.91-100,431.02

Finding the Fourth Proportional to 185,315.78, 255,728.91 and 100,431.02

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Solution

The fourth proportional to 185,315.78, 255,728.91 and 100,431.02 is: 138,591.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,315.78 : 255,728.91 = 100,431.02 : x
  2. Step 2: Convert to fraction form
    185,315.78/255,728.91 = 100,431.02/x
  3. Step 3: Cross multiply
    185,315.78x = 255,728.91 × 100,431.02
  4. Step 4: Simplify right side
    185,315.78x = 25,683,115,274.79
  5. Step 5: Solve for x
    x = 25,683,115,274.79/185,315.78
  6. Step 6: Final answer
    x = 138,591.09

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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.