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Finding the Fourth Proportional to 323,406,411.40, 485,109,617.10 and 129,221,806.60

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Solution

The fourth proportional to 323,406,411.40, 485,109,617.10 and 129,221,806.60 is: 193,832,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,406,411.40 : 485,109,617.10 = 129,221,806.60 : x
  2. Step 2: Convert to fraction form
    323,406,411.40/485,109,617.10 = 129,221,806.60/x
  3. Step 3: Cross multiply
    323,406,411.40x = 485,109,617.10 × 129,221,806.60
  4. Step 4: Simplify right side
    323,406,411.40x = 62,686,741,120,696,256
  5. Step 5: Solve for x
    x = 62,686,741,120,696,256/323,406,411.40
  6. Step 6: Final answer
    x = 193,832,709.90

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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.