Home / 78,538,506.80-117,768,338.76-45,759,686

Finding the Fourth Proportional to 78,538,506.80, 117,768,338.76 and 45,759,686

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Solution

The fourth proportional to 78,538,506.80, 117,768,338.76 and 45,759,686 is: 68,616,560.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,538,506.80 : 117,768,338.76 = 45,759,686 : x
  2. Step 2: Convert to fraction form
    78,538,506.80/117,768,338.76 = 45,759,686/x
  3. Step 3: Cross multiply
    78,538,506.80x = 117,768,338.76 × 45,759,686
  4. Step 4: Simplify right side
    78,538,506.80x = 5,389,042,202,399,230
  5. Step 5: Solve for x
    x = 5,389,042,202,399,230/78,538,506.80
  6. Step 6: Final answer
    x = 68,616,560.49

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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.