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Finding the Fourth Proportional to 65,508.36, 90,310 and 55,396.24

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Solution

The fourth proportional to 65,508.36, 90,310 and 55,396.24 is: 76,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,508.36 : 90,310 = 55,396.24 : x
  2. Step 2: Convert to fraction form
    65,508.36/90,310 = 55,396.24/x
  3. Step 3: Cross multiply
    65,508.36x = 90,310 × 55,396.24
  4. Step 4: Simplify right side
    65,508.36x = 5,002,834,434.40
  5. Step 5: Solve for x
    x = 5,002,834,434.40/65,508.36
  6. Step 6: Final answer
    x = 76,369.40

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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.