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Finding the Fourth Proportional to 139,968,212.70, 209,952,319.05 and 130,898,286.30

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Solution

The fourth proportional to 139,968,212.70, 209,952,319.05 and 130,898,286.30 is: 196,347,429.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,212.70 : 209,952,319.05 = 130,898,286.30 : x
  2. Step 2: Convert to fraction form
    139,968,212.70/209,952,319.05 = 130,898,286.30/x
  3. Step 3: Cross multiply
    139,968,212.70x = 209,952,319.05 × 130,898,286.30
  4. Step 4: Simplify right side
    139,968,212.70x = 27,482,398,768,355,844
  5. Step 5: Solve for x
    x = 27,482,398,768,355,844/139,968,212.70
  6. Step 6: Final answer
    x = 196,347,429.45

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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.