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Finding the Fourth Proportional to 245,577.87, 338,896.92 and 138,147.90

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Solution

The fourth proportional to 245,577.87, 338,896.92 and 138,147.90 is: 190,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,577.87 : 338,896.92 = 138,147.90 : x
  2. Step 2: Convert to fraction form
    245,577.87/338,896.92 = 138,147.90/x
  3. Step 3: Cross multiply
    245,577.87x = 338,896.92 × 138,147.90
  4. Step 4: Simplify right side
    245,577.87x = 46,817,897,814.47
  5. Step 5: Solve for x
    x = 46,817,897,814.47/245,577.87
  6. Step 6: Final answer
    x = 190,643.80

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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.