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Finding the Fourth Proportional to 54,287.60, 81,431.40 and 45,071.60

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Solution

The fourth proportional to 54,287.60, 81,431.40 and 45,071.60 is: 67,607.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,287.60 : 81,431.40 = 45,071.60 : x
  2. Step 2: Convert to fraction form
    54,287.60/81,431.40 = 45,071.60/x
  3. Step 3: Cross multiply
    54,287.60x = 81,431.40 × 45,071.60
  4. Step 4: Simplify right side
    54,287.60x = 3,670,243,488.24
  5. Step 5: Solve for x
    x = 3,670,243,488.24/54,287.60
  6. Step 6: Final answer
    x = 67,607.40

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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.