Home / 142,857.48-197,125.20-79,194.72

Finding the Fourth Proportional to 142,857.48, 197,125.20 and 79,194.72

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Solution

The fourth proportional to 142,857.48, 197,125.20 and 79,194.72 is: 109,278.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,857.48 : 197,125.20 = 79,194.72 : x
  2. Step 2: Convert to fraction form
    142,857.48/197,125.20 = 79,194.72/x
  3. Step 3: Cross multiply
    142,857.48x = 197,125.20 × 79,194.72
  4. Step 4: Simplify right side
    142,857.48x = 15,611,275,018.94
  5. Step 5: Solve for x
    x = 15,611,275,018.94/142,857.48
  6. Step 6: Final answer
    x = 109,278.67

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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.