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Finding the Fourth Proportional to 65,590.52, 90,501.18 and 38,724.44

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Solution

The fourth proportional to 65,590.52, 90,501.18 and 38,724.44 is: 53,431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,590.52 : 90,501.18 = 38,724.44 : x
  2. Step 2: Convert to fraction form
    65,590.52/90,501.18 = 38,724.44/x
  3. Step 3: Cross multiply
    65,590.52x = 90,501.18 × 38,724.44
  4. Step 4: Simplify right side
    65,590.52x = 3,504,607,514.84
  5. Step 5: Solve for x
    x = 3,504,607,514.84/65,590.52
  6. Step 6: Final answer
    x = 53,431.62

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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.