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Finding the Fourth Proportional to 81,114.67, 111,930.96 and 45,299.71

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Solution

The fourth proportional to 81,114.67, 111,930.96 and 45,299.71 is: 62,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,114.67 : 111,930.96 = 45,299.71 : x
  2. Step 2: Convert to fraction form
    81,114.67/111,930.96 = 45,299.71/x
  3. Step 3: Cross multiply
    81,114.67x = 111,930.96 × 45,299.71
  4. Step 4: Simplify right side
    81,114.67x = 5,070,440,028.02
  5. Step 5: Solve for x
    x = 5,070,440,028.02/81,114.67
  6. Step 6: Final answer
    x = 62,509.53

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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.