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Finding the Fourth Proportional to 245,589.34, 338,909.91 and 138,159.34

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Solution

The fourth proportional to 245,589.34, 338,909.91 and 138,159.34 is: 190,657.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,589.34 : 338,909.91 = 138,159.34 : x
  2. Step 2: Convert to fraction form
    245,589.34/338,909.91 = 138,159.34/x
  3. Step 3: Cross multiply
    245,589.34x = 338,909.91 × 138,159.34
  4. Step 4: Simplify right side
    245,589.34x = 46,823,569,485.06
  5. Step 5: Solve for x
    x = 46,823,569,485.06/245,589.34
  6. Step 6: Final answer
    x = 190,657.99

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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.