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Finding the Fourth Proportional to 81,952.73, 122,738.55 and 79,111.51

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Solution

The fourth proportional to 81,952.73, 122,738.55 and 79,111.51 is: 118,483.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,952.73 : 122,738.55 = 79,111.51 : x
  2. Step 2: Convert to fraction form
    81,952.73/122,738.55 = 79,111.51/x
  3. Step 3: Cross multiply
    81,952.73x = 122,738.55 × 79,111.51
  4. Step 4: Simplify right side
    81,952.73x = 9,710,032,025.71
  5. Step 5: Solve for x
    x = 9,710,032,025.71/81,952.73
  6. Step 6: Final answer
    x = 118,483.33

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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.