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Finding the Fourth Proportional to 139,979,908.60, 209,969,862.90 and 111,069,518.20

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Solution

The fourth proportional to 139,979,908.60, 209,969,862.90 and 111,069,518.20 is: 166,604,277.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,979,908.60 : 209,969,862.90 = 111,069,518.20 : x
  2. Step 2: Convert to fraction form
    139,979,908.60/209,969,862.90 = 111,069,518.20/x
  3. Step 3: Cross multiply
    139,979,908.60x = 209,969,862.90 × 111,069,518.20
  4. Step 4: Simplify right side
    139,979,908.60x = 23,321,251,508,823,056
  5. Step 5: Solve for x
    x = 23,321,251,508,823,056/139,979,908.60
  6. Step 6: Final answer
    x = 166,604,277.30

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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.