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Finding the Fourth Proportional to 85,785.48, 128,702.52 and 35,889.48

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Solution

The fourth proportional to 85,785.48, 128,702.52 and 35,889.48 is: 53,844.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,785.48 : 128,702.52 = 35,889.48 : x
  2. Step 2: Convert to fraction form
    85,785.48/128,702.52 = 35,889.48/x
  3. Step 3: Cross multiply
    85,785.48x = 128,702.52 × 35,889.48
  4. Step 4: Simplify right side
    85,785.48x = 4,619,066,517.49
  5. Step 5: Solve for x
    x = 4,619,066,517.49/85,785.48
  6. Step 6: Final answer
    x = 53,844.39

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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.