Home / 76,787.81-105,975.79-42,799.40

Finding the Fourth Proportional to 76,787.81, 105,975.79 and 42,799.40

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Solution

The fourth proportional to 76,787.81, 105,975.79 and 42,799.40 is: 59,067.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,787.81 : 105,975.79 = 42,799.40 : x
  2. Step 2: Convert to fraction form
    76,787.81/105,975.79 = 42,799.40/x
  3. Step 3: Cross multiply
    76,787.81x = 105,975.79 × 42,799.40
  4. Step 4: Simplify right side
    76,787.81x = 4,535,699,589.65
  5. Step 5: Solve for x
    x = 4,535,699,589.65/76,787.81
  6. Step 6: Final answer
    x = 59,067.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.