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Finding the Fourth Proportional to 113,859.79, 171,163.32 and 105,639.10

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Solution

The fourth proportional to 113,859.79, 171,163.32 and 105,639.10 is: 158,805.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,859.79 : 171,163.32 = 105,639.10 : x
  2. Step 2: Convert to fraction form
    113,859.79/171,163.32 = 105,639.10/x
  3. Step 3: Cross multiply
    113,859.79x = 171,163.32 × 105,639.10
  4. Step 4: Simplify right side
    113,859.79x = 18,081,539,077.81
  5. Step 5: Solve for x
    x = 18,081,539,077.81/113,859.79
  6. Step 6: Final answer
    x = 158,805.31

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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.