Home / 100,518.36-138,726.39-57,501.82

Finding the Fourth Proportional to 100,518.36, 138,726.39 and 57,501.82

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Solution

The fourth proportional to 100,518.36, 138,726.39 and 57,501.82 is: 79,358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,518.36 : 138,726.39 = 57,501.82 : x
  2. Step 2: Convert to fraction form
    100,518.36/138,726.39 = 57,501.82/x
  3. Step 3: Cross multiply
    100,518.36x = 138,726.39 × 57,501.82
  4. Step 4: Simplify right side
    100,518.36x = 7,977,019,907.03
  5. Step 5: Solve for x
    x = 7,977,019,907.03/100,518.36
  6. Step 6: Final answer
    x = 79,358.83

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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.