Home / 85,840,039.20-128,760,058.80-82,491,960.90

Finding the Fourth Proportional to 85,840,039.20, 128,760,058.80 and 82,491,960.90

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Solution

The fourth proportional to 85,840,039.20, 128,760,058.80 and 82,491,960.90 is: 123,737,941.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840,039.20 : 128,760,058.80 = 82,491,960.90 : x
  2. Step 2: Convert to fraction form
    85,840,039.20/128,760,058.80 = 82,491,960.90/x
  3. Step 3: Cross multiply
    85,840,039.20x = 128,760,058.80 × 82,491,960.90
  4. Step 4: Simplify right side
    85,840,039.20x = 10,621,669,736,011,302
  5. Step 5: Solve for x
    x = 10,621,669,736,011,302/85,840,039.20
  6. Step 6: Final answer
    x = 123,737,941.35

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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.