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Finding the Fourth Proportional to 139,968,702.20, 209,953,053.30 and 137,701,220.60

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Solution

The fourth proportional to 139,968,702.20, 209,953,053.30 and 137,701,220.60 is: 206,551,830.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,702.20 : 209,953,053.30 = 137,701,220.60 : x
  2. Step 2: Convert to fraction form
    139,968,702.20/209,953,053.30 = 137,701,220.60/x
  3. Step 3: Cross multiply
    139,968,702.20x = 209,953,053.30 × 137,701,220.60
  4. Step 4: Simplify right side
    139,968,702.20x = 28,910,791,708,106,860
  5. Step 5: Solve for x
    x = 28,910,791,708,106,860/139,968,702.20
  6. Step 6: Final answer
    x = 206,551,830.90

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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.