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Finding the Fourth Proportional to 245,636.88, 338,978.24 and 138,207.04

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Solution

The fourth proportional to 245,636.88, 338,978.24 and 138,207.04 is: 190,725.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,636.88 : 338,978.24 = 138,207.04 : x
  2. Step 2: Convert to fraction form
    245,636.88/338,978.24 = 138,207.04/x
  3. Step 3: Cross multiply
    245,636.88x = 338,978.24 × 138,207.04
  4. Step 4: Simplify right side
    245,636.88x = 46,849,179,174.81
  5. Step 5: Solve for x
    x = 46,849,179,174.81/245,636.88
  6. Step 6: Final answer
    x = 190,725.35

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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.