Home / 69,009.07-103,513.95-20,978.11

Finding the Fourth Proportional to 69,009.07, 103,513.95 and 20,978.11

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Solution

The fourth proportional to 69,009.07, 103,513.95 and 20,978.11 is: 31,467.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,009.07 : 103,513.95 = 20,978.11 : x
  2. Step 2: Convert to fraction form
    69,009.07/103,513.95 = 20,978.11/x
  3. Step 3: Cross multiply
    69,009.07x = 103,513.95 × 20,978.11
  4. Step 4: Simplify right side
    69,009.07x = 2,171,526,924.74
  5. Step 5: Solve for x
    x = 2,171,526,924.74/69,009.07
  6. Step 6: Final answer
    x = 31,467.27

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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.