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Finding the Fourth Proportional to 139,470.50, 209,964.74 and 127,070.22

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Solution

The fourth proportional to 139,470.50, 209,964.74 and 127,070.22 is: 191,296.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,470.50 : 209,964.74 = 127,070.22 : x
  2. Step 2: Convert to fraction form
    139,470.50/209,964.74 = 127,070.22/x
  3. Step 3: Cross multiply
    139,470.50x = 209,964.74 × 127,070.22
  4. Step 4: Simplify right side
    139,470.50x = 26,680,265,704.04
  5. Step 5: Solve for x
    x = 26,680,265,704.04/139,470.50
  6. Step 6: Final answer
    x = 191,296.84

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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.