Home / 81,740.32-122,620.08-29,157.28

Finding the Fourth Proportional to 81,740.32, 122,620.08 and 29,157.28

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Solution

The fourth proportional to 81,740.32, 122,620.08 and 29,157.28 is: 43,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,740.32 : 122,620.08 = 29,157.28 : x
  2. Step 2: Convert to fraction form
    81,740.32/122,620.08 = 29,157.28/x
  3. Step 3: Cross multiply
    81,740.32x = 122,620.08 × 29,157.28
  4. Step 4: Simplify right side
    81,740.32x = 3,575,268,006.18
  5. Step 5: Solve for x
    x = 3,575,268,006.18/81,740.32
  6. Step 6: Final answer
    x = 43,739.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.