Home / 77,128,976.39-115,694,142.57-19,621,308.38

Finding the Fourth Proportional to 77,128,976.39, 115,694,142.57 and 19,621,308.38

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Solution

The fourth proportional to 77,128,976.39, 115,694,142.57 and 19,621,308.38 is: 29,432,135.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128,976.39 : 115,694,142.57 = 19,621,308.38 : x
  2. Step 2: Convert to fraction form
    77,128,976.39/115,694,142.57 = 19,621,308.38/x
  3. Step 3: Cross multiply
    77,128,976.39x = 115,694,142.57 × 19,621,308.38
  4. Step 4: Simplify right side
    77,128,976.39x = 2,270,070,448,547,185
  5. Step 5: Solve for x
    x = 2,270,070,448,547,185/77,128,976.39
  6. Step 6: Final answer
    x = 29,432,135.04

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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.