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Finding the Fourth Proportional to 139,988,906.40, 209,983,359.60 and 139,988,906.40

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Solution

The fourth proportional to 139,988,906.40, 209,983,359.60 and 139,988,906.40 is: 209,983,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,988,906.40 : 209,983,359.60 = 139,988,906.40 : x
  2. Step 2: Convert to fraction form
    139,988,906.40/209,983,359.60 = 139,988,906.40/x
  3. Step 3: Cross multiply
    139,988,906.40x = 209,983,359.60 × 139,988,906.40
  4. Step 4: Simplify right side
    139,988,906.40x = 29,395,340,872,601,940
  5. Step 5: Solve for x
    x = 29,395,340,872,601,940/139,988,906.40
  6. Step 6: Final answer
    x = 209,983,359.60

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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.