Home / 142,292.14-196,374.81-78,631

Finding the Fourth Proportional to 142,292.14, 196,374.81 and 78,631

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Solution

The fourth proportional to 142,292.14, 196,374.81 and 78,631 is: 108,517.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,292.14 : 196,374.81 = 78,631 : x
  2. Step 2: Convert to fraction form
    142,292.14/196,374.81 = 78,631/x
  3. Step 3: Cross multiply
    142,292.14x = 196,374.81 × 78,631
  4. Step 4: Simplify right side
    142,292.14x = 15,441,147,685.11
  5. Step 5: Solve for x
    x = 15,441,147,685.11/142,292.14
  6. Step 6: Final answer
    x = 108,517.22

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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.