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Finding the Fourth Proportional to 85,215.70, 127,838.40 and 35,268.40

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Solution

The fourth proportional to 85,215.70, 127,838.40 and 35,268.40 is: 52,908.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,215.70 : 127,838.40 = 35,268.40 : x
  2. Step 2: Convert to fraction form
    85,215.70/127,838.40 = 35,268.40/x
  3. Step 3: Cross multiply
    85,215.70x = 127,838.40 × 35,268.40
  4. Step 4: Simplify right side
    85,215.70x = 4,508,655,826.56
  5. Step 5: Solve for x
    x = 4,508,655,826.56/85,215.70
  6. Step 6: Final answer
    x = 52,908.75

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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.