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Finding the Fourth Proportional to 199,988,206.80, 299,982,310.20 and 139,472,264.40

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Solution

The fourth proportional to 199,988,206.80, 299,982,310.20 and 139,472,264.40 is: 209,208,396.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,988,206.80 : 299,982,310.20 = 139,472,264.40 : x
  2. Step 2: Convert to fraction form
    199,988,206.80/299,982,310.20 = 139,472,264.40/x
  3. Step 3: Cross multiply
    199,988,206.80x = 299,982,310.20 × 139,472,264.40
  4. Step 4: Simplify right side
    199,988,206.80x = 41,839,212,083,537,216
  5. Step 5: Solve for x
    x = 41,839,212,083,537,216/199,988,206.80
  6. Step 6: Final answer
    x = 209,208,396.60

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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.