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Finding the Fourth Proportional to 245,317.92, 338,539.68 and 137,892.48

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Solution

The fourth proportional to 245,317.92, 338,539.68 and 137,892.48 is: 190,292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,317.92 : 338,539.68 = 137,892.48 : x
  2. Step 2: Convert to fraction form
    245,317.92/338,539.68 = 137,892.48/x
  3. Step 3: Cross multiply
    245,317.92x = 338,539.68 × 137,892.48
  4. Step 4: Simplify right side
    245,317.92x = 46,682,076,053.61
  5. Step 5: Solve for x
    x = 46,682,076,053.61/245,317.92
  6. Step 6: Final answer
    x = 190,292.16

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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.