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Finding the Fourth Proportional to 245,990.34, 339,467.85 and 138,562.07

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Solution

The fourth proportional to 245,990.34, 339,467.85 and 138,562.07 is: 191,216.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,990.34 : 339,467.85 = 138,562.07 : x
  2. Step 2: Convert to fraction form
    245,990.34/339,467.85 = 138,562.07/x
  3. Step 3: Cross multiply
    245,990.34x = 339,467.85 × 138,562.07
  4. Step 4: Simplify right side
    245,990.34x = 47,037,366,297.11
  5. Step 5: Solve for x
    x = 47,037,366,297.11/245,990.34
  6. Step 6: Final answer
    x = 191,216.31

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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.