Home / 142,053.36-196,033.20-78,390.60

Finding the Fourth Proportional to 142,053.36, 196,033.20 and 78,390.60

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Solution

The fourth proportional to 142,053.36, 196,033.20 and 78,390.60 is: 108,178.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,053.36 : 196,033.20 = 78,390.60 : x
  2. Step 2: Convert to fraction form
    142,053.36/196,033.20 = 78,390.60/x
  3. Step 3: Cross multiply
    142,053.36x = 196,033.20 × 78,390.60
  4. Step 4: Simplify right side
    142,053.36x = 15,367,160,167.92
  5. Step 5: Solve for x
    x = 15,367,160,167.92/142,053.36
  6. Step 6: Final answer
    x = 108,178.79

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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.