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Finding the Fourth Proportional to 245,610.75, 338,941.49 and 138,181.47

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Solution

The fourth proportional to 245,610.75, 338,941.49 and 138,181.47 is: 190,689.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,610.75 : 338,941.49 = 138,181.47 : x
  2. Step 2: Convert to fraction form
    245,610.75/338,941.49 = 138,181.47/x
  3. Step 3: Cross multiply
    245,610.75x = 338,941.49 × 138,181.47
  4. Step 4: Simplify right side
    245,610.75x = 46,835,433,332.19
  5. Step 5: Solve for x
    x = 46,835,433,332.19/245,610.75
  6. Step 6: Final answer
    x = 190,689.67

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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.