Home / 142,243.87-196,288.66-81,815.53

Finding the Fourth Proportional to 142,243.87, 196,288.66 and 81,815.53

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Solution

The fourth proportional to 142,243.87, 196,288.66 and 81,815.53 is: 112,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,243.87 : 196,288.66 = 81,815.53 : x
  2. Step 2: Convert to fraction form
    142,243.87/196,288.66 = 81,815.53/x
  3. Step 3: Cross multiply
    142,243.87x = 196,288.66 × 81,815.53
  4. Step 4: Simplify right side
    142,243.87x = 16,059,460,055.63
  5. Step 5: Solve for x
    x = 16,059,460,055.63/142,243.87
  6. Step 6: Final answer
    x = 112,900.90

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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.