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Finding the Fourth Proportional to 64,498,840.80, 90,553,468.80 and 64,498,840.80

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Solution

The fourth proportional to 64,498,840.80, 90,553,468.80 and 64,498,840.80 is: 90,553,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,498,840.80 : 90,553,468.80 = 64,498,840.80 : x
  2. Step 2: Convert to fraction form
    64,498,840.80/90,553,468.80 = 64,498,840.80/x
  3. Step 3: Cross multiply
    64,498,840.80x = 90,553,468.80 × 64,498,840.80
  4. Step 4: Simplify right side
    64,498,840.80x = 5,840,593,768,018,967
  5. Step 5: Solve for x
    x = 5,840,593,768,018,967/64,498,840.80
  6. Step 6: Final answer
    x = 90,553,468.80

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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.