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Finding the Fourth Proportional to 58,910.70, 81,270.32 and 39,784.26

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Solution

The fourth proportional to 58,910.70, 81,270.32 and 39,784.26 is: 54,884.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,910.70 : 81,270.32 = 39,784.26 : x
  2. Step 2: Convert to fraction form
    58,910.70/81,270.32 = 39,784.26/x
  3. Step 3: Cross multiply
    58,910.70x = 81,270.32 × 39,784.26
  4. Step 4: Simplify right side
    58,910.70x = 3,233,279,541.16
  5. Step 5: Solve for x
    x = 3,233,279,541.16/58,910.70
  6. Step 6: Final answer
    x = 54,884.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.