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Finding the Fourth Proportional to 66,463.78, 91,697.06 and 42,603.62

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Solution

The fourth proportional to 66,463.78, 91,697.06 and 42,603.62 is: 58,778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463.78 : 91,697.06 = 42,603.62 : x
  2. Step 2: Convert to fraction form
    66,463.78/91,697.06 = 42,603.62/x
  3. Step 3: Cross multiply
    66,463.78x = 91,697.06 × 42,603.62
  4. Step 4: Simplify right side
    66,463.78x = 3,906,626,699.36
  5. Step 5: Solve for x
    x = 3,906,626,699.36/66,463.78
  6. Step 6: Final answer
    x = 58,778.28

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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.