Home / 142,089.20-196,081.84-78,425.63

Finding the Fourth Proportional to 142,089.20, 196,081.84 and 78,425.63

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Solution

The fourth proportional to 142,089.20, 196,081.84 and 78,425.63 is: 108,226.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,089.20 : 196,081.84 = 78,425.63 : x
  2. Step 2: Convert to fraction form
    142,089.20/196,081.84 = 78,425.63/x
  3. Step 3: Cross multiply
    142,089.20x = 196,081.84 × 78,425.63
  4. Step 4: Simplify right side
    142,089.20x = 15,377,840,657.09
  5. Step 5: Solve for x
    x = 15,377,840,657.09/142,089.20
  6. Step 6: Final answer
    x = 108,226.67

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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.