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Finding the Fourth Proportional to 139,303.40, 208,986.62 and 45,809.96

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Solution

The fourth proportional to 139,303.40, 208,986.62 and 45,809.96 is: 68,725.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,303.40 : 208,986.62 = 45,809.96 : x
  2. Step 2: Convert to fraction form
    139,303.40/208,986.62 = 45,809.96/x
  3. Step 3: Cross multiply
    139,303.40x = 208,986.62 × 45,809.96
  4. Step 4: Simplify right side
    139,303.40x = 9,573,668,702.74
  5. Step 5: Solve for x
    x = 9,573,668,702.74/139,303.40
  6. Step 6: Final answer
    x = 68,725.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.