Home / 105,405.76-158,131.68-31,539.52

Finding the Fourth Proportional to 105,405.76, 158,131.68 and 31,539.52

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Solution

The fourth proportional to 105,405.76, 158,131.68 and 31,539.52 is: 47,316.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,405.76 : 158,131.68 = 31,539.52 : x
  2. Step 2: Convert to fraction form
    105,405.76/158,131.68 = 31,539.52/x
  3. Step 3: Cross multiply
    105,405.76x = 158,131.68 × 31,539.52
  4. Step 4: Simplify right side
    105,405.76x = 4,987,397,283.99
  5. Step 5: Solve for x
    x = 4,987,397,283.99/105,405.76
  6. Step 6: Final answer
    x = 47,316.17

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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.