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Finding the Fourth Proportional to 139,968,131.60, 209,952,197.40 and 105,200,080.40

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Solution

The fourth proportional to 139,968,131.60, 209,952,197.40 and 105,200,080.40 is: 157,800,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,131.60 : 209,952,197.40 = 105,200,080.40 : x
  2. Step 2: Convert to fraction form
    139,968,131.60/209,952,197.40 = 105,200,080.40/x
  3. Step 3: Cross multiply
    139,968,131.60x = 209,952,197.40 × 105,200,080.40
  4. Step 4: Simplify right side
    139,968,131.60x = 22,086,988,046,636,672
  5. Step 5: Solve for x
    x = 22,086,988,046,636,672/139,968,131.60
  6. Step 6: Final answer
    x = 157,800,120.60

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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.