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Finding the Fourth Proportional to 123,287.86, 170,138.64 and 69,573.52

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Solution

The fourth proportional to 123,287.86, 170,138.64 and 69,573.52 is: 96,012.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,287.86 : 170,138.64 = 69,573.52 : x
  2. Step 2: Convert to fraction form
    123,287.86/170,138.64 = 69,573.52/x
  3. Step 3: Cross multiply
    123,287.86x = 170,138.64 × 69,573.52
  4. Step 4: Simplify right side
    123,287.86x = 11,837,144,072.81
  5. Step 5: Solve for x
    x = 11,837,144,072.81/123,287.86
  6. Step 6: Final answer
    x = 96,012.24

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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.