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Finding the Fourth Proportional to 66,682.36, 91,978.30 and 42,771.16

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Solution

The fourth proportional to 66,682.36, 91,978.30 and 42,771.16 is: 58,996.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,682.36 : 91,978.30 = 42,771.16 : x
  2. Step 2: Convert to fraction form
    66,682.36/91,978.30 = 42,771.16/x
  3. Step 3: Cross multiply
    66,682.36x = 91,978.30 × 42,771.16
  4. Step 4: Simplify right side
    66,682.36x = 3,934,018,585.83
  5. Step 5: Solve for x
    x = 3,934,018,585.83/66,682.36
  6. Step 6: Final answer
    x = 58,996.39

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1.5x scale

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.