Home / 42,138.50-58,131.14-28,531.51

Finding the Fourth Proportional to 42,138.50, 58,131.14 and 28,531.51

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Solution

The fourth proportional to 42,138.50, 58,131.14 and 28,531.51 is: 39,359.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.50 : 58,131.14 = 28,531.51 : x
  2. Step 2: Convert to fraction form
    42,138.50/58,131.14 = 28,531.51/x
  3. Step 3: Cross multiply
    42,138.50x = 58,131.14 × 28,531.51
  4. Step 4: Simplify right side
    42,138.50x = 1,658,568,914.24
  5. Step 5: Solve for x
    x = 1,658,568,914.24/42,138.50
  6. Step 6: Final answer
    x = 39,359.95

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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.