Home / 81,338.72-112,202.55-57,176.82

Finding the Fourth Proportional to 81,338.72, 112,202.55 and 57,176.82

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Solution

The fourth proportional to 81,338.72, 112,202.55 and 57,176.82 is: 78,872.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,338.72 : 112,202.55 = 57,176.82 : x
  2. Step 2: Convert to fraction form
    81,338.72/112,202.55 = 57,176.82/x
  3. Step 3: Cross multiply
    81,338.72x = 112,202.55 × 57,176.82
  4. Step 4: Simplify right side
    81,338.72x = 6,415,385,004.89
  5. Step 5: Solve for x
    x = 6,415,385,004.89/81,338.72
  6. Step 6: Final answer
    x = 78,872.47

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1.5x scale

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.