Home / 143,528.15-198,063.83-78,997.07

Finding the Fourth Proportional to 143,528.15, 198,063.83 and 78,997.07

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Solution

The fourth proportional to 143,528.15, 198,063.83 and 78,997.07 is: 109,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,528.15 : 198,063.83 = 78,997.07 : x
  2. Step 2: Convert to fraction form
    143,528.15/198,063.83 = 78,997.07/x
  3. Step 3: Cross multiply
    143,528.15x = 198,063.83 × 78,997.07
  4. Step 4: Simplify right side
    143,528.15x = 15,646,462,935.63
  5. Step 5: Solve for x
    x = 15,646,462,935.63/143,528.15
  6. Step 6: Final answer
    x = 109,013.20

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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.