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Finding the Fourth Proportional to 39,109,511.30, 54,866,689.90 and 39,109,511.30

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Solution

The fourth proportional to 39,109,511.30, 54,866,689.90 and 39,109,511.30 is: 54,866,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,109,511.30 : 54,866,689.90 = 39,109,511.30 : x
  2. Step 2: Convert to fraction form
    39,109,511.30/54,866,689.90 = 39,109,511.30/x
  3. Step 3: Cross multiply
    39,109,511.30x = 54,866,689.90 × 39,109,511.30
  4. Step 4: Simplify right side
    39,109,511.30x = 2,145,809,428,637,645.75
  5. Step 5: Solve for x
    x = 2,145,809,428,637,645.75/39,109,511.30
  6. Step 6: Final answer
    x = 54,866,689.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.