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Finding the Fourth Proportional to 245,047.73, 338,173.47 and 137,620.08

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Solution

The fourth proportional to 245,047.73, 338,173.47 and 137,620.08 is: 189,919.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,047.73 : 338,173.47 = 137,620.08 : x
  2. Step 2: Convert to fraction form
    245,047.73/338,173.47 = 137,620.08/x
  3. Step 3: Cross multiply
    245,047.73x = 338,173.47 × 137,620.08
  4. Step 4: Simplify right side
    245,047.73x = 46,539,459,995.28
  5. Step 5: Solve for x
    x = 46,539,459,995.28/245,047.73
  6. Step 6: Final answer
    x = 189,919.98

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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.