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Finding the Fourth Proportional to 85,908.39, 128,912.80 and 35,984.24

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Solution

The fourth proportional to 85,908.39, 128,912.80 and 35,984.24 is: 53,997.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,908.39 : 128,912.80 = 35,984.24 : x
  2. Step 2: Convert to fraction form
    85,908.39/128,912.80 = 35,984.24/x
  3. Step 3: Cross multiply
    85,908.39x = 128,912.80 × 35,984.24
  4. Step 4: Simplify right side
    85,908.39x = 4,638,829,134.27
  5. Step 5: Solve for x
    x = 4,638,829,134.27/85,908.39
  6. Step 6: Final answer
    x = 53,997.39

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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.