Home / 80,507,486.40-121,298,977.38-72,840,958.32

Finding the Fourth Proportional to 80,507,486.40, 121,298,977.38 and 72,840,958.32

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Solution

The fourth proportional to 80,507,486.40, 121,298,977.38 and 72,840,958.32 is: 109,747,976.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,507,486.40 : 121,298,977.38 = 72,840,958.32 : x
  2. Step 2: Convert to fraction form
    80,507,486.40/121,298,977.38 = 72,840,958.32/x
  3. Step 3: Cross multiply
    80,507,486.40x = 121,298,977.38 × 72,840,958.32
  4. Step 4: Simplify right side
    80,507,486.40x = 8,835,533,755,595,202
  5. Step 5: Solve for x
    x = 8,835,533,755,595,202/80,507,486.40
  6. Step 6: Final answer
    x = 109,747,976.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.