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Finding the Fourth Proportional to 139,968,310.30, 209,952,465.45 and 127,203,228.70

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Solution

The fourth proportional to 139,968,310.30, 209,952,465.45 and 127,203,228.70 is: 190,804,843.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,310.30 : 209,952,465.45 = 127,203,228.70 : x
  2. Step 2: Convert to fraction form
    139,968,310.30/209,952,465.45 = 127,203,228.70/x
  3. Step 3: Cross multiply
    139,968,310.30x = 209,952,465.45 × 127,203,228.70
  4. Step 4: Simplify right side
    139,968,310.30x = 26,706,631,478,765,196
  5. Step 5: Solve for x
    x = 26,706,631,478,765,196/139,968,310.30
  6. Step 6: Final answer
    x = 190,804,843.05

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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.