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Finding the Fourth Proportional to 248,011.30, 342,240.28 and 139,109.64

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Solution

The fourth proportional to 248,011.30, 342,240.28 and 139,109.64 is: 191,962.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,011.30 : 342,240.28 = 139,109.64 : x
  2. Step 2: Convert to fraction form
    248,011.30/342,240.28 = 139,109.64/x
  3. Step 3: Cross multiply
    248,011.30x = 342,240.28 × 139,109.64
  4. Step 4: Simplify right side
    248,011.30x = 47,608,922,144.30
  5. Step 5: Solve for x
    x = 47,608,922,144.30/248,011.30
  6. Step 6: Final answer
    x = 191,962.71

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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.