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Finding the Fourth Proportional to 54,552.78, 81,809.01 and 42,888.78

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Solution

The fourth proportional to 54,552.78, 81,809.01 and 42,888.78 is: 64,317.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,552.78 : 81,809.01 = 42,888.78 : x
  2. Step 2: Convert to fraction form
    54,552.78/81,809.01 = 42,888.78/x
  3. Step 3: Cross multiply
    54,552.78x = 81,809.01 × 42,888.78
  4. Step 4: Simplify right side
    54,552.78x = 3,508,688,631.91
  5. Step 5: Solve for x
    x = 3,508,688,631.91/54,552.78
  6. Step 6: Final answer
    x = 64,317.32

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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.