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Finding the Fourth Proportional to 71,856.81, 99,163.06 and 45,015.03

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Solution

The fourth proportional to 71,856.81, 99,163.06 and 45,015.03 is: 62,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,856.81 : 99,163.06 = 45,015.03 : x
  2. Step 2: Convert to fraction form
    71,856.81/99,163.06 = 45,015.03/x
  3. Step 3: Cross multiply
    71,856.81x = 99,163.06 × 45,015.03
  4. Step 4: Simplify right side
    71,856.81x = 4,463,828,008.25
  5. Step 5: Solve for x
    x = 4,463,828,008.25/71,856.81
  6. Step 6: Final answer
    x = 62,121.15

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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.