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Finding the Fourth Proportional to 72,382,968.30, 108,574,452.45 and 61,045,560.30

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Solution

The fourth proportional to 72,382,968.30, 108,574,452.45 and 61,045,560.30 is: 91,568,340.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,382,968.30 : 108,574,452.45 = 61,045,560.30 : x
  2. Step 2: Convert to fraction form
    72,382,968.30/108,574,452.45 = 61,045,560.30/x
  3. Step 3: Cross multiply
    72,382,968.30x = 108,574,452.45 × 61,045,560.30
  4. Step 4: Simplify right side
    72,382,968.30x = 6,627,988,284,075,958
  5. Step 5: Solve for x
    x = 6,627,988,284,075,958/72,382,968.30
  6. Step 6: Final answer
    x = 91,568,340.45

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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.