Home / 81,206,884.20-121,810,326.30-72,278,675.40

Finding the Fourth Proportional to 81,206,884.20, 121,810,326.30 and 72,278,675.40

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Solution

The fourth proportional to 81,206,884.20, 121,810,326.30 and 72,278,675.40 is: 108,418,013.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,206,884.20 : 121,810,326.30 = 72,278,675.40 : x
  2. Step 2: Convert to fraction form
    81,206,884.20/121,810,326.30 = 72,278,675.40/x
  3. Step 3: Cross multiply
    81,206,884.20x = 121,810,326.30 × 72,278,675.40
  4. Step 4: Simplify right side
    81,206,884.20x = 8,804,289,035,005,784
  5. Step 5: Solve for x
    x = 8,804,289,035,005,784/81,206,884.20
  6. Step 6: Final answer
    x = 108,418,013.10

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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.