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Finding the Fourth Proportional to 78,980.90, 108,993.62 and 44,992.54

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Solution

The fourth proportional to 78,980.90, 108,993.62 and 44,992.54 is: 62,089.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,980.90 : 108,993.62 = 44,992.54 : x
  2. Step 2: Convert to fraction form
    78,980.90/108,993.62 = 44,992.54/x
  3. Step 3: Cross multiply
    78,980.90x = 108,993.62 × 44,992.54
  4. Step 4: Simplify right side
    78,980.90x = 4,903,899,807.59
  5. Step 5: Solve for x
    x = 4,903,899,807.59/78,980.90
  6. Step 6: Final answer
    x = 62,089.69

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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.