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Finding the Fourth Proportional to 128,249.52, 176,905.80 and 82,853.88

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Solution

The fourth proportional to 128,249.52, 176,905.80 and 82,853.88 is: 114,287.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.52 : 176,905.80 = 82,853.88 : x
  2. Step 2: Convert to fraction form
    128,249.52/176,905.80 = 82,853.88/x
  3. Step 3: Cross multiply
    128,249.52x = 176,905.80 × 82,853.88
  4. Step 4: Simplify right side
    128,249.52x = 14,657,331,924.50
  5. Step 5: Solve for x
    x = 14,657,331,924.50/128,249.52
  6. Step 6: Final answer
    x = 114,287.62

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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.