Home / 77,326,738.40-115,990,107.60-66,804,206.60

Finding the Fourth Proportional to 77,326,738.40, 115,990,107.60 and 66,804,206.60

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Solution

The fourth proportional to 77,326,738.40, 115,990,107.60 and 66,804,206.60 is: 100,206,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,326,738.40 : 115,990,107.60 = 66,804,206.60 : x
  2. Step 2: Convert to fraction form
    77,326,738.40/115,990,107.60 = 66,804,206.60/x
  3. Step 3: Cross multiply
    77,326,738.40x = 115,990,107.60 × 66,804,206.60
  4. Step 4: Simplify right side
    77,326,738.40x = 7,748,627,111,666,630
  5. Step 5: Solve for x
    x = 7,748,627,111,666,630/77,326,738.40
  6. Step 6: Final answer
    x = 100,206,309.90

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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.