Home / 85,086.72-127,628.88-38,306.40

Finding the Fourth Proportional to 85,086.72, 127,628.88 and 38,306.40

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Solution

The fourth proportional to 85,086.72, 127,628.88 and 38,306.40 is: 57,459.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,086.72 : 127,628.88 = 38,306.40 : x
  2. Step 2: Convert to fraction form
    85,086.72/127,628.88 = 38,306.40/x
  3. Step 3: Cross multiply
    85,086.72x = 127,628.88 × 38,306.40
  4. Step 4: Simplify right side
    85,086.72x = 4,889,002,928.83
  5. Step 5: Solve for x
    x = 4,889,002,928.83/85,086.72
  6. Step 6: Final answer
    x = 57,459.06

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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.