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Finding the Fourth Proportional to 117,213.78, 161,969.58 and 85,327.32

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Solution

The fourth proportional to 117,213.78, 161,969.58 and 85,327.32 is: 117,907.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,213.78 : 161,969.58 = 85,327.32 : x
  2. Step 2: Convert to fraction form
    117,213.78/161,969.58 = 85,327.32/x
  3. Step 3: Cross multiply
    117,213.78x = 161,969.58 × 85,327.32
  4. Step 4: Simplify right side
    117,213.78x = 13,820,430,182.93
  5. Step 5: Solve for x
    x = 13,820,430,182.93/117,213.78
  6. Step 6: Final answer
    x = 117,907.90

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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.