Home / 143,357.20-197,838.04-78,831.35

Finding the Fourth Proportional to 143,357.20, 197,838.04 and 78,831.35

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Solution

The fourth proportional to 143,357.20, 197,838.04 and 78,831.35 is: 108,790.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,357.20 : 197,838.04 = 78,831.35 : x
  2. Step 2: Convert to fraction form
    143,357.20/197,838.04 = 78,831.35/x
  3. Step 3: Cross multiply
    143,357.20x = 197,838.04 × 78,831.35
  4. Step 4: Simplify right side
    143,357.20x = 15,595,839,774.55
  5. Step 5: Solve for x
    x = 15,595,839,774.55/143,357.20
  6. Step 6: Final answer
    x = 108,790.07

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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.