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Finding the Fourth Proportional to 58,805.52, 81,185.25 and 38,720.76

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Solution

The fourth proportional to 58,805.52, 81,185.25 and 38,720.76 is: 53,456.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,805.52 : 81,185.25 = 38,720.76 : x
  2. Step 2: Convert to fraction form
    58,805.52/81,185.25 = 38,720.76/x
  3. Step 3: Cross multiply
    58,805.52x = 81,185.25 × 38,720.76
  4. Step 4: Simplify right side
    58,805.52x = 3,143,554,580.79
  5. Step 5: Solve for x
    x = 3,143,554,580.79/58,805.52
  6. Step 6: Final answer
    x = 53,456.79

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1.5x scale

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.