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Finding the Fourth Proportional to 291,275,998.80, 436,913,998.20 and 118,658,713.20

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Solution

The fourth proportional to 291,275,998.80, 436,913,998.20 and 118,658,713.20 is: 177,988,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,275,998.80 : 436,913,998.20 = 118,658,713.20 : x
  2. Step 2: Convert to fraction form
    291,275,998.80/436,913,998.20 = 118,658,713.20/x
  3. Step 3: Cross multiply
    291,275,998.80x = 436,913,998.20 × 118,658,713.20
  4. Step 4: Simplify right side
    291,275,998.80x = 51,843,652,805,479,120
  5. Step 5: Solve for x
    x = 51,843,652,805,479,120/291,275,998.80
  6. Step 6: Final answer
    x = 177,988,069.80

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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.