Home / 128,203.20-192,263.76-42,795.72

Finding the Fourth Proportional to 128,203.20, 192,263.76 and 42,795.72

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Solution

The fourth proportional to 128,203.20, 192,263.76 and 42,795.72 is: 64,179.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203.20 : 192,263.76 = 42,795.72 : x
  2. Step 2: Convert to fraction form
    128,203.20/192,263.76 = 42,795.72/x
  3. Step 3: Cross multiply
    128,203.20x = 192,263.76 × 42,795.72
  4. Step 4: Simplify right side
    128,203.20x = 8,228,066,039.11
  5. Step 5: Solve for x
    x = 8,228,066,039.11/128,203.20
  6. Step 6: Final answer
    x = 64,179.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.