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Finding the Fourth Proportional to 85,338.71, 128,023.09 and 29,165.62

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Solution

The fourth proportional to 85,338.71, 128,023.09 and 29,165.62 is: 43,753.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,338.71 : 128,023.09 = 29,165.62 : x
  2. Step 2: Convert to fraction form
    85,338.71/128,023.09 = 29,165.62/x
  3. Step 3: Cross multiply
    85,338.71x = 128,023.09 × 29,165.62
  4. Step 4: Simplify right side
    85,338.71x = 3,733,872,401.19
  5. Step 5: Solve for x
    x = 3,733,872,401.19/85,338.71
  6. Step 6: Final answer
    x = 43,753.56

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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.