Home / 86,861.12-129,995.82-72,837

Finding the Fourth Proportional to 86,861.12, 129,995.82 and 72,837

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Solution

The fourth proportional to 86,861.12, 129,995.82 and 72,837 is: 109,007.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,861.12 : 129,995.82 = 72,837 : x
  2. Step 2: Convert to fraction form
    86,861.12/129,995.82 = 72,837/x
  3. Step 3: Cross multiply
    86,861.12x = 129,995.82 × 72,837
  4. Step 4: Simplify right side
    86,861.12x = 9,468,505,541.34
  5. Step 5: Solve for x
    x = 9,468,505,541.34/86,861.12
  6. Step 6: Final answer
    x = 109,007.41

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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.