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Finding the Fourth Proportional to 84,015.50, 115,940.31 and 45,776.63

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Solution

The fourth proportional to 84,015.50, 115,940.31 and 45,776.63 is: 63,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,015.50 : 115,940.31 = 45,776.63 : x
  2. Step 2: Convert to fraction form
    84,015.50/115,940.31 = 45,776.63/x
  3. Step 3: Cross multiply
    84,015.50x = 115,940.31 × 45,776.63
  4. Step 4: Simplify right side
    84,015.50x = 5,307,356,093.25
  5. Step 5: Solve for x
    x = 5,307,356,093.25/84,015.50
  6. Step 6: Final answer
    x = 63,171.16

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1.5x scale

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.