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Finding the Fourth Proportional to 85,797.96, 128,724.36 and 26,645.28

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Solution

The fourth proportional to 85,797.96, 128,724.36 and 26,645.28 is: 39,976.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,797.96 : 128,724.36 = 26,645.28 : x
  2. Step 2: Convert to fraction form
    85,797.96/128,724.36 = 26,645.28/x
  3. Step 3: Cross multiply
    85,797.96x = 128,724.36 × 26,645.28
  4. Step 4: Simplify right side
    85,797.96x = 3,429,896,615.02
  5. Step 5: Solve for x
    x = 3,429,896,615.02/85,797.96
  6. Step 6: Final answer
    x = 39,976.44

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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.