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Finding the Fourth Proportional to 38,128.60, 57,130.48 and 36,670.60

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Solution

The fourth proportional to 38,128.60, 57,130.48 and 36,670.60 is: 54,945.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,128.60 : 57,130.48 = 36,670.60 : x
  2. Step 2: Convert to fraction form
    38,128.60/57,130.48 = 36,670.60/x
  3. Step 3: Cross multiply
    38,128.60x = 57,130.48 × 36,670.60
  4. Step 4: Simplify right side
    38,128.60x = 2,095,008,979.89
  5. Step 5: Solve for x
    x = 2,095,008,979.89/38,128.60
  6. Step 6: Final answer
    x = 54,945.87

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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.