Home / 100,112.89-138,128.47-58,719.66

Finding the Fourth Proportional to 100,112.89, 138,128.47 and 58,719.66

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Solution

The fourth proportional to 100,112.89, 138,128.47 and 58,719.66 is: 81,017.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.89 : 138,128.47 = 58,719.66 : x
  2. Step 2: Convert to fraction form
    100,112.89/138,128.47 = 58,719.66/x
  3. Step 3: Cross multiply
    100,112.89x = 138,128.47 × 58,719.66
  4. Step 4: Simplify right side
    100,112.89x = 8,110,856,794.72
  5. Step 5: Solve for x
    x = 8,110,856,794.72/100,112.89
  6. Step 6: Final answer
    x = 81,017.11

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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.