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Finding the Fourth Proportional to 66,603.36, 91,913.04 and 36,388.32

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Solution

The fourth proportional to 66,603.36, 91,913.04 and 36,388.32 is: 50,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.36 : 91,913.04 = 36,388.32 : x
  2. Step 2: Convert to fraction form
    66,603.36/91,913.04 = 36,388.32/x
  3. Step 3: Cross multiply
    66,603.36x = 91,913.04 × 36,388.32
  4. Step 4: Simplify right side
    66,603.36x = 3,344,561,111.69
  5. Step 5: Solve for x
    x = 3,344,561,111.69/66,603.36
  6. Step 6: Final answer
    x = 50,216.10

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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.