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Finding the Fourth Proportional to 128,036.90, 176,591.01 and 82,100.90

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Solution

The fourth proportional to 128,036.90, 176,591.01 and 82,100.90 is: 113,235.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,036.90 : 176,591.01 = 82,100.90 : x
  2. Step 2: Convert to fraction form
    128,036.90/176,591.01 = 82,100.90/x
  3. Step 3: Cross multiply
    128,036.90x = 176,591.01 × 82,100.90
  4. Step 4: Simplify right side
    128,036.90x = 14,498,280,852.91
  5. Step 5: Solve for x
    x = 14,498,280,852.91/128,036.90
  6. Step 6: Final answer
    x = 113,235.18

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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.