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Finding the Fourth Proportional to 139,968,205.80, 209,952,308.70 and 127,203,124.20

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Solution

The fourth proportional to 139,968,205.80, 209,952,308.70 and 127,203,124.20 is: 190,804,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,205.80 : 209,952,308.70 = 127,203,124.20 : x
  2. Step 2: Convert to fraction form
    139,968,205.80/209,952,308.70 = 127,203,124.20/x
  3. Step 3: Cross multiply
    139,968,205.80x = 209,952,308.70 × 127,203,124.20
  4. Step 4: Simplify right side
    139,968,205.80x = 26,706,589,599,642,840
  5. Step 5: Solve for x
    x = 26,706,589,599,642,840/139,968,205.80
  6. Step 6: Final answer
    x = 190,804,686.30

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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.