Home / 128,516.77-177,036.25-109,335.11

Finding the Fourth Proportional to 128,516.77, 177,036.25 and 109,335.11

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Solution

The fourth proportional to 128,516.77, 177,036.25 and 109,335.11 is: 150,612.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.77 : 177,036.25 = 109,335.11 : x
  2. Step 2: Convert to fraction form
    128,516.77/177,036.25 = 109,335.11/x
  3. Step 3: Cross multiply
    128,516.77x = 177,036.25 × 109,335.11
  4. Step 4: Simplify right side
    128,516.77x = 19,356,276,914.22
  5. Step 5: Solve for x
    x = 19,356,276,914.22/128,516.77
  6. Step 6: Final answer
    x = 150,612.85

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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.