Home / 77,128,967.12-115,694,128.76-19,621,299.28

Finding the Fourth Proportional to 77,128,967.12, 115,694,128.76 and 19,621,299.28

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Solution

The fourth proportional to 77,128,967.12, 115,694,128.76 and 19,621,299.28 is: 29,432,121.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128,967.12 : 115,694,128.76 = 19,621,299.28 : x
  2. Step 2: Convert to fraction form
    77,128,967.12/115,694,128.76 = 19,621,299.28/x
  3. Step 3: Cross multiply
    77,128,967.12x = 115,694,128.76 × 19,621,299.28
  4. Step 4: Simplify right side
    77,128,967.12x = 2,270,069,125,338,815.50
  5. Step 5: Solve for x
    x = 2,270,069,125,338,815.50/77,128,967.12
  6. Step 6: Final answer
    x = 29,432,121.42

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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.