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Finding the Fourth Proportional to 54,125.40, 81,101.70 and 45,312.60

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Solution

The fourth proportional to 54,125.40, 81,101.70 and 45,312.60 is: 67,896.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,125.40 : 81,101.70 = 45,312.60 : x
  2. Step 2: Convert to fraction form
    54,125.40/81,101.70 = 45,312.60/x
  3. Step 3: Cross multiply
    54,125.40x = 81,101.70 × 45,312.60
  4. Step 4: Simplify right side
    54,125.40x = 3,674,928,891.42
  5. Step 5: Solve for x
    x = 3,674,928,891.42/54,125.40
  6. Step 6: Final answer
    x = 67,896.57

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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.