Home / 128,012.17-191,958.81-74,719.54

Finding the Fourth Proportional to 128,012.17, 191,958.81 and 74,719.54

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Solution

The fourth proportional to 128,012.17, 191,958.81 and 74,719.54 is: 112,044.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012.17 : 191,958.81 = 74,719.54 : x
  2. Step 2: Convert to fraction form
    128,012.17/191,958.81 = 74,719.54/x
  3. Step 3: Cross multiply
    128,012.17x = 191,958.81 × 74,719.54
  4. Step 4: Simplify right side
    128,012.17x = 14,343,073,982.15
  5. Step 5: Solve for x
    x = 14,343,073,982.15/128,012.17
  6. Step 6: Final answer
    x = 112,044.61

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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.