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Finding the Fourth Proportional to 230,659.81, 318,311.01 and 128,682.72

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Solution

The fourth proportional to 230,659.81, 318,311.01 and 128,682.72 is: 177,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,659.81 : 318,311.01 = 128,682.72 : x
  2. Step 2: Convert to fraction form
    230,659.81/318,311.01 = 128,682.72/x
  3. Step 3: Cross multiply
    230,659.81x = 318,311.01 × 128,682.72
  4. Step 4: Simplify right side
    230,659.81x = 40,961,126,572.75
  5. Step 5: Solve for x
    x = 40,961,126,572.75/230,659.81
  6. Step 6: Final answer
    x = 177,582.42

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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.