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Finding the Fourth Proportional to 81,259.96, 112,138.99 and 45,447.64

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Solution

The fourth proportional to 81,259.96, 112,138.99 and 45,447.64 is: 62,717.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.96 : 112,138.99 = 45,447.64 : x
  2. Step 2: Convert to fraction form
    81,259.96/112,138.99 = 45,447.64/x
  3. Step 3: Cross multiply
    81,259.96x = 112,138.99 × 45,447.64
  4. Step 4: Simplify right side
    81,259.96x = 5,096,453,161.55
  5. Step 5: Solve for x
    x = 5,096,453,161.55/81,259.96
  6. Step 6: Final answer
    x = 62,717.89

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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.