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Finding the Fourth Proportional to 128,326.70, 177,007.41 and 82,313.52

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Solution

The fourth proportional to 128,326.70, 177,007.41 and 82,313.52 is: 113,539.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,326.70 : 177,007.41 = 82,313.52 : x
  2. Step 2: Convert to fraction form
    128,326.70/177,007.41 = 82,313.52/x
  3. Step 3: Cross multiply
    128,326.70x = 177,007.41 × 82,313.52
  4. Step 4: Simplify right side
    128,326.70x = 14,570,102,983.18
  5. Step 5: Solve for x
    x = 14,570,102,983.18/128,326.70
  6. Step 6: Final answer
    x = 113,539.14

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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.