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Finding the Fourth Proportional to 85,005.30, 127,507.95 and 51,179.70

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Solution

The fourth proportional to 85,005.30, 127,507.95 and 51,179.70 is: 76,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,005.30 : 127,507.95 = 51,179.70 : x
  2. Step 2: Convert to fraction form
    85,005.30/127,507.95 = 51,179.70/x
  3. Step 3: Cross multiply
    85,005.30x = 127,507.95 × 51,179.70
  4. Step 4: Simplify right side
    85,005.30x = 6,525,818,628.62
  5. Step 5: Solve for x
    x = 6,525,818,628.62/85,005.30
  6. Step 6: Final answer
    x = 76,769.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.