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Finding the Fourth Proportional to 65,581.99, 90,472.41 and 38,706.19

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Solution

The fourth proportional to 65,581.99, 90,472.41 and 38,706.19 is: 53,396.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,581.99 : 90,472.41 = 38,706.19 : x
  2. Step 2: Convert to fraction form
    65,581.99/90,472.41 = 38,706.19/x
  3. Step 3: Cross multiply
    65,581.99x = 90,472.41 × 38,706.19
  4. Step 4: Simplify right side
    65,581.99x = 3,501,842,291.22
  5. Step 5: Solve for x
    x = 3,501,842,291.22/65,581.99
  6. Step 6: Final answer
    x = 53,396.40

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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.