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Finding the Fourth Proportional to 115,448.90, 159,355.78 and 67,721.54

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Solution

The fourth proportional to 115,448.90, 159,355.78 and 67,721.54 is: 93,477.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,448.90 : 159,355.78 = 67,721.54 : x
  2. Step 2: Convert to fraction form
    115,448.90/159,355.78 = 67,721.54/x
  3. Step 3: Cross multiply
    115,448.90x = 159,355.78 × 67,721.54
  4. Step 4: Simplify right side
    115,448.90x = 10,791,818,829.50
  5. Step 5: Solve for x
    x = 10,791,818,829.50/115,448.90
  6. Step 6: Final answer
    x = 93,477.02

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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.