Home / 129,728,157.72-179,219,309.95-85,179,820.65

Finding the Fourth Proportional to 129,728,157.72, 179,219,309.95 and 85,179,820.65

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Solution

The fourth proportional to 129,728,157.72, 179,219,309.95 and 85,179,820.65 is: 117,675,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,728,157.72 : 179,219,309.95 = 85,179,820.65 : x
  2. Step 2: Convert to fraction form
    129,728,157.72/179,219,309.95 = 85,179,820.65/x
  3. Step 3: Cross multiply
    129,728,157.72x = 179,219,309.95 × 85,179,820.65
  4. Step 4: Simplify right side
    129,728,157.72x = 15,265,868,678,557,760
  5. Step 5: Solve for x
    x = 15,265,868,678,557,760/129,728,157.72
  6. Step 6: Final answer
    x = 117,675,830.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.