Home / 142,858.48-197,131.36-79,190.80

Finding the Fourth Proportional to 142,858.48, 197,131.36 and 79,190.80

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Solution

The fourth proportional to 142,858.48, 197,131.36 and 79,190.80 is: 109,275.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,858.48 : 197,131.36 = 79,190.80 : x
  2. Step 2: Convert to fraction form
    142,858.48/197,131.36 = 79,190.80/x
  3. Step 3: Cross multiply
    142,858.48x = 197,131.36 × 79,190.80
  4. Step 4: Simplify right side
    142,858.48x = 15,610,990,103.49
  5. Step 5: Solve for x
    x = 15,610,990,103.49/142,858.48
  6. Step 6: Final answer
    x = 109,275.91

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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.