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Finding the Fourth Proportional to 9,998,899.88, 13,798,492.98 and 5,415,226.52

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Solution

The fourth proportional to 9,998,899.88, 13,798,492.98 and 5,415,226.52 is: 7,473,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998,899.88 : 13,798,492.98 = 5,415,226.52 : x
  2. Step 2: Convert to fraction form
    9,998,899.88/13,798,492.98 = 5,415,226.52/x
  3. Step 3: Cross multiply
    9,998,899.88x = 13,798,492.98 × 5,415,226.52
  4. Step 4: Simplify right side
    9,998,899.88x = 74,721,965,121,329.83
  5. Step 5: Solve for x
    x = 74,721,965,121,329.83/9,998,899.88
  6. Step 6: Final answer
    x = 7,473,018.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.