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Finding the Fourth Proportional to 81,321.77, 122,122.25 and 49,916.25

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Solution

The fourth proportional to 81,321.77, 122,122.25 and 49,916.25 is: 74,960.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,321.77 : 122,122.25 = 49,916.25 : x
  2. Step 2: Convert to fraction form
    81,321.77/122,122.25 = 49,916.25/x
  3. Step 3: Cross multiply
    81,321.77x = 122,122.25 × 49,916.25
  4. Step 4: Simplify right side
    81,321.77x = 6,095,884,699.17
  5. Step 5: Solve for x
    x = 6,095,884,699.17/81,321.77
  6. Step 6: Final answer
    x = 74,960.06

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1.5x scale

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.