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Finding the Fourth Proportional to 248,009.55, 342,237.86 and 139,107.90

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Solution

The fourth proportional to 248,009.55, 342,237.86 and 139,107.90 is: 191,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,009.55 : 342,237.86 = 139,107.90 : x
  2. Step 2: Convert to fraction form
    248,009.55/342,237.86 = 139,107.90/x
  3. Step 3: Cross multiply
    248,009.55x = 342,237.86 × 139,107.90
  4. Step 4: Simplify right side
    248,009.55x = 47,607,989,309.55
  5. Step 5: Solve for x
    x = 47,607,989,309.55/248,009.55
  6. Step 6: Final answer
    x = 191,960.31

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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.