Home / 105,726.87-158,490-39,121.79

Finding the Fourth Proportional to 105,726.87, 158,490 and 39,121.79

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Solution

The fourth proportional to 105,726.87, 158,490 and 39,121.79 is: 58,645.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,726.87 : 158,490 = 39,121.79 : x
  2. Step 2: Convert to fraction form
    105,726.87/158,490 = 39,121.79/x
  3. Step 3: Cross multiply
    105,726.87x = 158,490 × 39,121.79
  4. Step 4: Simplify right side
    105,726.87x = 6,200,411,704.65
  5. Step 5: Solve for x
    x = 6,200,411,704.65/105,726.87
  6. Step 6: Final answer
    x = 58,645.56

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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.