Home / 112,493,287.20-168,739,930.80-78,453,069.60

Finding the Fourth Proportional to 112,493,287.20, 168,739,930.80 and 78,453,069.60

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Solution

The fourth proportional to 112,493,287.20, 168,739,930.80 and 78,453,069.60 is: 117,679,604.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,493,287.20 : 168,739,930.80 = 78,453,069.60 : x
  2. Step 2: Convert to fraction form
    112,493,287.20/168,739,930.80 = 78,453,069.60/x
  3. Step 3: Cross multiply
    112,493,287.20x = 168,739,930.80 × 78,453,069.60
  4. Step 4: Simplify right side
    112,493,287.20x = 13,238,165,535,351,584
  5. Step 5: Solve for x
    x = 13,238,165,535,351,584/112,493,287.20
  6. Step 6: Final answer
    x = 117,679,604.40

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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.