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Finding the Fourth Proportional to 245,564.90, 338,876.16 and 138,134.90

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Solution

The fourth proportional to 245,564.90, 338,876.16 and 138,134.90 is: 190,624.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,564.90 : 338,876.16 = 138,134.90 : x
  2. Step 2: Convert to fraction form
    245,564.90/338,876.16 = 138,134.90/x
  3. Step 3: Cross multiply
    245,564.90x = 338,876.16 × 138,134.90
  4. Step 4: Simplify right side
    245,564.90x = 46,810,624,473.98
  5. Step 5: Solve for x
    x = 46,810,624,473.98/245,564.90
  6. Step 6: Final answer
    x = 190,624.25

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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.