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Finding the Fourth Proportional to 54,678.29, 81,717.83 and 39,918.29

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Solution

The fourth proportional to 54,678.29, 81,717.83 and 39,918.29 is: 59,658.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,678.29 : 81,717.83 = 39,918.29 : x
  2. Step 2: Convert to fraction form
    54,678.29/81,717.83 = 39,918.29/x
  3. Step 3: Cross multiply
    54,678.29x = 81,717.83 × 39,918.29
  4. Step 4: Simplify right side
    54,678.29x = 3,262,036,036.11
  5. Step 5: Solve for x
    x = 3,262,036,036.11/54,678.29
  6. Step 6: Final answer
    x = 59,658.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.