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Finding the Fourth Proportional to 115,449.90, 159,357.16 and 67,722.54

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Solution

The fourth proportional to 115,449.90, 159,357.16 and 67,722.54 is: 93,478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,449.90 : 159,357.16 = 67,722.54 : x
  2. Step 2: Convert to fraction form
    115,449.90/159,357.16 = 67,722.54/x
  3. Step 3: Cross multiply
    115,449.90x = 159,357.16 × 67,722.54
  4. Step 4: Simplify right side
    115,449.90x = 10,792,071,642.39
  5. Step 5: Solve for x
    x = 10,792,071,642.39/115,449.90
  6. Step 6: Final answer
    x = 93,478.40

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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.