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Finding the Fourth Proportional to 85,805.53, 128,708.39 and 35,858.30

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Solution

The fourth proportional to 85,805.53, 128,708.39 and 35,858.30 is: 53,787.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805.53 : 128,708.39 = 35,858.30 : x
  2. Step 2: Convert to fraction form
    85,805.53/128,708.39 = 35,858.30/x
  3. Step 3: Cross multiply
    85,805.53x = 128,708.39 × 35,858.30
  4. Step 4: Simplify right side
    85,805.53x = 4,615,263,507.24
  5. Step 5: Solve for x
    x = 4,615,263,507.24/85,805.53
  6. Step 6: Final answer
    x = 53,787.48

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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.