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Finding the Fourth Proportional to 128,035.90, 176,589.63 and 82,099.90

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Solution

The fourth proportional to 128,035.90, 176,589.63 and 82,099.90 is: 113,233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,035.90 : 176,589.63 = 82,099.90 : x
  2. Step 2: Convert to fraction form
    128,035.90/176,589.63 = 82,099.90/x
  3. Step 3: Cross multiply
    128,035.90x = 176,589.63 × 82,099.90
  4. Step 4: Simplify right side
    128,035.90x = 14,497,991,184.77
  5. Step 5: Solve for x
    x = 14,497,991,184.77/128,035.90
  6. Step 6: Final answer
    x = 113,233.80

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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.