Home / 142,951.05-197,277.80-78,416.33

Finding the Fourth Proportional to 142,951.05, 197,277.80 and 78,416.33

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Solution

The fourth proportional to 142,951.05, 197,277.80 and 78,416.33 is: 108,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,951.05 : 197,277.80 = 78,416.33 : x
  2. Step 2: Convert to fraction form
    142,951.05/197,277.80 = 78,416.33/x
  3. Step 3: Cross multiply
    142,951.05x = 197,277.80 × 78,416.33
  4. Step 4: Simplify right side
    142,951.05x = 15,469,799,688.00
  5. Step 5: Solve for x
    x = 15,469,799,688.00/142,951.05
  6. Step 6: Final answer
    x = 108,217.46

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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.