Home / 142,014.07-195,981.69-78,351.85

Finding the Fourth Proportional to 142,014.07, 195,981.69 and 78,351.85

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Solution

The fourth proportional to 142,014.07, 195,981.69 and 78,351.85 is: 108,126.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,014.07 : 195,981.69 = 78,351.85 : x
  2. Step 2: Convert to fraction form
    142,014.07/195,981.69 = 78,351.85/x
  3. Step 3: Cross multiply
    142,014.07x = 195,981.69 × 78,351.85
  4. Step 4: Simplify right side
    142,014.07x = 15,355,527,977.63
  5. Step 5: Solve for x
    x = 15,355,527,977.63/142,014.07
  6. Step 6: Final answer
    x = 108,126.81

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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.