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Finding the Fourth Proportional to 54,356.79, 81,442.24 and 42,505.99

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Solution

The fourth proportional to 54,356.79, 81,442.24 and 42,505.99 is: 63,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,356.79 : 81,442.24 = 42,505.99 : x
  2. Step 2: Convert to fraction form
    54,356.79/81,442.24 = 42,505.99/x
  3. Step 3: Cross multiply
    54,356.79x = 81,442.24 × 42,505.99
  4. Step 4: Simplify right side
    54,356.79x = 3,461,783,039.02
  5. Step 5: Solve for x
    x = 3,461,783,039.02/54,356.79
  6. Step 6: Final answer
    x = 63,686.30

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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.