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Finding the Fourth Proportional to 253,447, 349,751.44 and 138,725.64

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Solution

The fourth proportional to 253,447, 349,751.44 and 138,725.64 is: 191,438.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,447 : 349,751.44 = 138,725.64 : x
  2. Step 2: Convert to fraction form
    253,447/349,751.44 = 138,725.64/x
  3. Step 3: Cross multiply
    253,447x = 349,751.44 × 138,725.64
  4. Step 4: Simplify right side
    253,447x = 48,519,492,354.92
  5. Step 5: Solve for x
    x = 48,519,492,354.92/253,447
  6. Step 6: Final answer
    x = 191,438.42

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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.