Home / 78,113,654.49-117,189,964.62-55,129,485.33

Finding the Fourth Proportional to 78,113,654.49, 117,189,964.62 and 55,129,485.33

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Solution

The fourth proportional to 78,113,654.49, 117,189,964.62 and 55,129,485.33 is: 82,707,978.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,113,654.49 : 117,189,964.62 = 55,129,485.33 : x
  2. Step 2: Convert to fraction form
    78,113,654.49/117,189,964.62 = 55,129,485.33/x
  3. Step 3: Cross multiply
    78,113,654.49x = 117,189,964.62 × 55,129,485.33
  4. Step 4: Simplify right side
    78,113,654.49x = 6,460,622,435,341,509
  5. Step 5: Solve for x
    x = 6,460,622,435,341,509/78,113,654.49
  6. Step 6: Final answer
    x = 82,707,978.23

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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.