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Finding the Fourth Proportional to 85,307.54, 127,961.31 and 43,728.02

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Solution

The fourth proportional to 85,307.54, 127,961.31 and 43,728.02 is: 65,592.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,307.54 : 127,961.31 = 43,728.02 : x
  2. Step 2: Convert to fraction form
    85,307.54/127,961.31 = 43,728.02/x
  3. Step 3: Cross multiply
    85,307.54x = 127,961.31 × 43,728.02
  4. Step 4: Simplify right side
    85,307.54x = 5,595,494,722.91
  5. Step 5: Solve for x
    x = 5,595,494,722.91/85,307.54
  6. Step 6: Final answer
    x = 65,592.03

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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.