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Finding the Fourth Proportional to 206,657,683.84, 309,986,526.22 and 85,489,135.84

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Solution

The fourth proportional to 206,657,683.84, 309,986,526.22 and 85,489,135.84 is: 128,233,703.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,657,683.84 : 309,986,526.22 = 85,489,135.84 : x
  2. Step 2: Convert to fraction form
    206,657,683.84/309,986,526.22 = 85,489,135.84/x
  3. Step 3: Cross multiply
    206,657,683.84x = 309,986,526.22 × 85,489,135.84
  4. Step 4: Simplify right side
    206,657,683.84x = 26,500,480,248,591,304
  5. Step 5: Solve for x
    x = 26,500,480,248,591,304/206,657,683.84
  6. Step 6: Final answer
    x = 128,233,703.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.