Home / 142,900.36-197,205.20-78,365.51

Finding the Fourth Proportional to 142,900.36, 197,205.20 and 78,365.51

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Solution

The fourth proportional to 142,900.36, 197,205.20 and 78,365.51 is: 108,145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,900.36 : 197,205.20 = 78,365.51 : x
  2. Step 2: Convert to fraction form
    142,900.36/197,205.20 = 78,365.51/x
  3. Step 3: Cross multiply
    142,900.36x = 197,205.20 × 78,365.51
  4. Step 4: Simplify right side
    142,900.36x = 15,454,086,072.65
  5. Step 5: Solve for x
    x = 15,454,086,072.65/142,900.36
  6. Step 6: Final answer
    x = 108,145.89

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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.