Home / 78,032,087.12-107,721,621-51,969,976.40

Finding the Fourth Proportional to 78,032,087.12, 107,721,621 and 51,969,976.40

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Solution

The fourth proportional to 78,032,087.12, 107,721,621 and 51,969,976.40 is: 71,743,436.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,032,087.12 : 107,721,621 = 51,969,976.40 : x
  2. Step 2: Convert to fraction form
    78,032,087.12/107,721,621 = 51,969,976.40/x
  3. Step 3: Cross multiply
    78,032,087.12x = 107,721,621 × 51,969,976.40
  4. Step 4: Simplify right side
    78,032,087.12x = 5,598,290,101,139,744
  5. Step 5: Solve for x
    x = 5,598,290,101,139,744/78,032,087.12
  6. Step 6: Final answer
    x = 71,743,436.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.