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Finding the Fourth Proportional to 85,798.73, 118,361.30 and 57,131.61

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Solution

The fourth proportional to 85,798.73, 118,361.30 and 57,131.61 is: 78,814.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.73 : 118,361.30 = 57,131.61 : x
  2. Step 2: Convert to fraction form
    85,798.73/118,361.30 = 57,131.61/x
  3. Step 3: Cross multiply
    85,798.73x = 118,361.30 × 57,131.61
  4. Step 4: Simplify right side
    85,798.73x = 6,762,171,345.03
  5. Step 5: Solve for x
    x = 6,762,171,345.03/85,798.73
  6. Step 6: Final answer
    x = 78,814.36

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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.