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Finding the Fourth Proportional to 139,456, 209,942.84 and 127,055.71

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Solution

The fourth proportional to 139,456, 209,942.84 and 127,055.71 is: 191,274.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,456 : 209,942.84 = 127,055.71 : x
  2. Step 2: Convert to fraction form
    139,456/209,942.84 = 127,055.71/x
  3. Step 3: Cross multiply
    139,456x = 209,942.84 × 127,055.71
  4. Step 4: Simplify right side
    139,456x = 26,674,436,595.62
  5. Step 5: Solve for x
    x = 26,674,436,595.62/139,456
  6. Step 6: Final answer
    x = 191,274.93

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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.