Home / 142,153.14-196,170.06-78,489.56

Finding the Fourth Proportional to 142,153.14, 196,170.06 and 78,489.56

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Solution

The fourth proportional to 142,153.14, 196,170.06 and 78,489.56 is: 108,314.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,153.14 : 196,170.06 = 78,489.56 : x
  2. Step 2: Convert to fraction form
    142,153.14/196,170.06 = 78,489.56/x
  3. Step 3: Cross multiply
    142,153.14x = 196,170.06 × 78,489.56
  4. Step 4: Simplify right side
    142,153.14x = 15,397,301,694.57
  5. Step 5: Solve for x
    x = 15,397,301,694.57/142,153.14
  6. Step 6: Final answer
    x = 108,314.89

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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.