Home / 81,211.40-112,106.28-49,390.52

Finding the Fourth Proportional to 81,211.40, 112,106.28 and 49,390.52

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Solution

The fourth proportional to 81,211.40, 112,106.28 and 49,390.52 is: 68,179.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211.40 : 112,106.28 = 49,390.52 : x
  2. Step 2: Convert to fraction form
    81,211.40/112,106.28 = 49,390.52/x
  3. Step 3: Cross multiply
    81,211.40x = 112,106.28 × 49,390.52
  4. Step 4: Simplify right side
    81,211.40x = 5,536,987,464.47
  5. Step 5: Solve for x
    x = 5,536,987,464.47/81,211.40
  6. Step 6: Final answer
    x = 68,179.93

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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.