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Finding the Fourth Proportional to 431,137,744.40, 646,706,616.60 and 124,439,862.80

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Solution

The fourth proportional to 431,137,744.40, 646,706,616.60 and 124,439,862.80 is: 186,659,794.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,137,744.40 : 646,706,616.60 = 124,439,862.80 : x
  2. Step 2: Convert to fraction form
    431,137,744.40/646,706,616.60 = 124,439,862.80/x
  3. Step 3: Cross multiply
    431,137,744.40x = 646,706,616.60 × 124,439,862.80
  4. Step 4: Simplify right side
    431,137,744.40x = 80,476,082,641,556,208
  5. Step 5: Solve for x
    x = 80,476,082,641,556,208/431,137,744.40
  6. Step 6: Final answer
    x = 186,659,794.20

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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.