Home / 142,504.27-196,655.07-78,840.70

Finding the Fourth Proportional to 142,504.27, 196,655.07 and 78,840.70

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Solution

The fourth proportional to 142,504.27, 196,655.07 and 78,840.70 is: 108,799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,504.27 : 196,655.07 = 78,840.70 : x
  2. Step 2: Convert to fraction form
    142,504.27/196,655.07 = 78,840.70/x
  3. Step 3: Cross multiply
    142,504.27x = 196,655.07 × 78,840.70
  4. Step 4: Simplify right side
    142,504.27x = 15,504,423,377.35
  5. Step 5: Solve for x
    x = 15,504,423,377.35/142,504.27
  6. Step 6: Final answer
    x = 108,799.71

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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.