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Finding the Fourth Proportional to 87,007.78, 120,128.52 and 66,828.52

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Solution

The fourth proportional to 87,007.78, 120,128.52 and 66,828.52 is: 92,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.78 : 120,128.52 = 66,828.52 : x
  2. Step 2: Convert to fraction form
    87,007.78/120,128.52 = 66,828.52/x
  3. Step 3: Cross multiply
    87,007.78x = 120,128.52 × 66,828.52
  4. Step 4: Simplify right side
    87,007.78x = 8,028,011,201.39
  5. Step 5: Solve for x
    x = 8,028,011,201.39/87,007.78
  6. Step 6: Final answer
    x = 92,267.74

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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.