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Finding the Fourth Proportional to 139,455, 209,941.34 and 127,054.71

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Solution

The fourth proportional to 139,455, 209,941.34 and 127,054.71 is: 191,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,455 : 209,941.34 = 127,054.71 : x
  2. Step 2: Convert to fraction form
    139,455/209,941.34 = 127,054.71/x
  3. Step 3: Cross multiply
    139,455x = 209,941.34 × 127,054.71
  4. Step 4: Simplify right side
    139,455x = 26,674,035,435.44
  5. Step 5: Solve for x
    x = 26,674,035,435.44/139,455
  6. Step 6: Final answer
    x = 191,273.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.