Home / 78,338,940.80-117,433,761.60-61,057,558.40

Finding the Fourth Proportional to 78,338,940.80, 117,433,761.60 and 61,057,558.40

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Solution

The fourth proportional to 78,338,940.80, 117,433,761.60 and 61,057,558.40 is: 91,528,155.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338,940.80 : 117,433,761.60 = 61,057,558.40 : x
  2. Step 2: Convert to fraction form
    78,338,940.80/117,433,761.60 = 61,057,558.40/x
  3. Step 3: Cross multiply
    78,338,940.80x = 117,433,761.60 × 61,057,558.40
  4. Step 4: Simplify right side
    78,338,940.80x = 7,170,218,757,023,677
  5. Step 5: Solve for x
    x = 7,170,218,757,023,677/78,338,940.80
  6. Step 6: Final answer
    x = 91,528,155.52

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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.