Home / 81,071.46-121,505.67-43,539.30

Finding the Fourth Proportional to 81,071.46, 121,505.67 and 43,539.30

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Solution

The fourth proportional to 81,071.46, 121,505.67 and 43,539.30 is: 65,254.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,071.46 : 121,505.67 = 43,539.30 : x
  2. Step 2: Convert to fraction form
    81,071.46/121,505.67 = 43,539.30/x
  3. Step 3: Cross multiply
    81,071.46x = 121,505.67 × 43,539.30
  4. Step 4: Simplify right side
    81,071.46x = 5,290,271,817.83
  5. Step 5: Solve for x
    x = 5,290,271,817.83/81,071.46
  6. Step 6: Final answer
    x = 65,254.43

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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.