Home / 109,105.56-163,618.02-85,777.56

Finding the Fourth Proportional to 109,105.56, 163,618.02 and 85,777.56

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Solution

The fourth proportional to 109,105.56, 163,618.02 and 85,777.56 is: 128,634.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,105.56 : 163,618.02 = 85,777.56 : x
  2. Step 2: Convert to fraction form
    109,105.56/163,618.02 = 85,777.56/x
  3. Step 3: Cross multiply
    109,105.56x = 163,618.02 × 85,777.56
  4. Step 4: Simplify right side
    109,105.56x = 14,034,754,527.63
  5. Step 5: Solve for x
    x = 14,034,754,527.63/109,105.56
  6. Step 6: Final answer
    x = 128,634.64

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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.