Home / 217,953.86-326,928.69-129,143.43

Finding the Fourth Proportional to 217,953.86, 326,928.69 and 129,143.43

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Solution

The fourth proportional to 217,953.86, 326,928.69 and 129,143.43 is: 193,713.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,953.86 : 326,928.69 = 129,143.43 : x
  2. Step 2: Convert to fraction form
    217,953.86/326,928.69 = 129,143.43/x
  3. Step 3: Cross multiply
    217,953.86x = 326,928.69 × 129,143.43
  4. Step 4: Simplify right side
    217,953.86x = 42,220,692,392.01
  5. Step 5: Solve for x
    x = 42,220,692,392.01/217,953.86
  6. Step 6: Final answer
    x = 193,713.91

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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.