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Finding the Fourth Proportional to 219,985,738.60, 329,978,607.90 and 99,053,386.60

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Solution

The fourth proportional to 219,985,738.60, 329,978,607.90 and 99,053,386.60 is: 148,580,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,985,738.60 : 329,978,607.90 = 99,053,386.60 : x
  2. Step 2: Convert to fraction form
    219,985,738.60/329,978,607.90 = 99,053,386.60/x
  3. Step 3: Cross multiply
    219,985,738.60x = 329,978,607.90 × 99,053,386.60
  4. Step 4: Simplify right side
    219,985,738.60x = 32,685,498,618,048,508
  5. Step 5: Solve for x
    x = 32,685,498,618,048,508/219,985,738.60
  6. Step 6: Final answer
    x = 148,580,079.90

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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.