Home / 142,291.09-196,361.78-78,628.89

Finding the Fourth Proportional to 142,291.09, 196,361.78 and 78,628.89

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Solution

The fourth proportional to 142,291.09, 196,361.78 and 78,628.89 is: 108,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,291.09 : 196,361.78 = 78,628.89 : x
  2. Step 2: Convert to fraction form
    142,291.09/196,361.78 = 78,628.89/x
  3. Step 3: Cross multiply
    142,291.09x = 196,361.78 × 78,628.89
  4. Step 4: Simplify right side
    142,291.09x = 15,439,707,424.87
  5. Step 5: Solve for x
    x = 15,439,707,424.87/142,291.09
  6. Step 6: Final answer
    x = 108,507.90

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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.