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Finding the Fourth Proportional to 71,668,604.93, 106,979,699.43 and 61,498,817.12

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Solution

The fourth proportional to 71,668,604.93, 106,979,699.43 and 61,498,817.12 is: 91,799,261.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668,604.93 : 106,979,699.43 = 61,498,817.12 : x
  2. Step 2: Convert to fraction form
    71,668,604.93/106,979,699.43 = 61,498,817.12/x
  3. Step 3: Cross multiply
    71,668,604.93x = 106,979,699.43 × 61,498,817.12
  4. Step 4: Simplify right side
    71,668,604.93x = 6,579,124,971,065,588
  5. Step 5: Solve for x
    x = 6,579,124,971,065,588/71,668,604.93
  6. Step 6: Final answer
    x = 91,799,261.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.