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Finding the Fourth Proportional to 245,309.15, 338,529.84 and 137,872.91

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Solution

The fourth proportional to 245,309.15, 338,529.84 and 137,872.91 is: 190,266.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,309.15 : 338,529.84 = 137,872.91 : x
  2. Step 2: Convert to fraction form
    245,309.15/338,529.84 = 137,872.91/x
  3. Step 3: Cross multiply
    245,309.15x = 338,529.84 × 137,872.91
  4. Step 4: Simplify right side
    245,309.15x = 46,674,094,162.63
  5. Step 5: Solve for x
    x = 46,674,094,162.63/245,309.15
  6. Step 6: Final answer
    x = 190,266.42

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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.