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Finding the Fourth Proportional to 85,490.52, 128,250.54 and 38,122.44

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Solution

The fourth proportional to 85,490.52, 128,250.54 and 38,122.44 is: 57,190.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,490.52 : 128,250.54 = 38,122.44 : x
  2. Step 2: Convert to fraction form
    85,490.52/128,250.54 = 38,122.44/x
  3. Step 3: Cross multiply
    85,490.52x = 128,250.54 × 38,122.44
  4. Step 4: Simplify right side
    85,490.52x = 4,889,223,516.12
  5. Step 5: Solve for x
    x = 4,889,223,516.12/85,490.52
  6. Step 6: Final answer
    x = 57,190.24

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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.