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Finding the Fourth Proportional to 58,887.80, 81,257.78 and 39,809.09

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Solution

The fourth proportional to 58,887.80, 81,257.78 and 39,809.09 is: 54,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,887.80 : 81,257.78 = 39,809.09 : x
  2. Step 2: Convert to fraction form
    58,887.80/81,257.78 = 39,809.09/x
  3. Step 3: Cross multiply
    58,887.80x = 81,257.78 × 39,809.09
  4. Step 4: Simplify right side
    58,887.80x = 3,234,798,122.81
  5. Step 5: Solve for x
    x = 3,234,798,122.81/58,887.80
  6. Step 6: Final answer
    x = 54,931.55

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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.