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Finding the Fourth Proportional to 81,102.16, 111,914.67 and 45,288.82

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Solution

The fourth proportional to 81,102.16, 111,914.67 and 45,288.82 is: 62,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,102.16 : 111,914.67 = 45,288.82 : x
  2. Step 2: Convert to fraction form
    81,102.16/111,914.67 = 45,288.82/x
  3. Step 3: Cross multiply
    81,102.16x = 111,914.67 × 45,288.82
  4. Step 4: Simplify right side
    81,102.16x = 5,068,483,344.99
  5. Step 5: Solve for x
    x = 5,068,483,344.99/81,102.16
  6. Step 6: Final answer
    x = 62,495.05

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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.