Home / 143,340.45-197,813.61-78,812.38

Finding the Fourth Proportional to 143,340.45, 197,813.61 and 78,812.38

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Solution

The fourth proportional to 143,340.45, 197,813.61 and 78,812.38 is: 108,763.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,340.45 : 197,813.61 = 78,812.38 : x
  2. Step 2: Convert to fraction form
    143,340.45/197,813.61 = 78,812.38/x
  3. Step 3: Cross multiply
    143,340.45x = 197,813.61 × 78,812.38
  4. Step 4: Simplify right side
    143,340.45x = 15,590,161,400.49
  5. Step 5: Solve for x
    x = 15,590,161,400.49/143,340.45
  6. Step 6: Final answer
    x = 108,763.17

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1.5x scale

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.