Home / 7,458,721.20-11,188,081.80-7,139,856.60

Finding the Fourth Proportional to 7,458,721.20, 11,188,081.80 and 7,139,856.60

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Solution

The fourth proportional to 7,458,721.20, 11,188,081.80 and 7,139,856.60 is: 10,709,784.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,458,721.20 : 11,188,081.80 = 7,139,856.60 : x
  2. Step 2: Convert to fraction form
    7,458,721.20/11,188,081.80 = 7,139,856.60/x
  3. Step 3: Cross multiply
    7,458,721.20x = 11,188,081.80 × 7,139,856.60
  4. Step 4: Simplify right side
    7,458,721.20x = 79,881,299,681,069.88
  5. Step 5: Solve for x
    x = 79,881,299,681,069.88/7,458,721.20
  6. Step 6: Final answer
    x = 10,709,784.90

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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.