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Finding the Fourth Proportional to 125,985,900.80, 188,978,851.20 and 104,462,540.30

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Solution

The fourth proportional to 125,985,900.80, 188,978,851.20 and 104,462,540.30 is: 156,693,810.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,985,900.80 : 188,978,851.20 = 104,462,540.30 : x
  2. Step 2: Convert to fraction form
    125,985,900.80/188,978,851.20 = 104,462,540.30/x
  3. Step 3: Cross multiply
    125,985,900.80x = 188,978,851.20 × 104,462,540.30
  4. Step 4: Simplify right side
    125,985,900.80x = 19,741,210,859,327,700
  5. Step 5: Solve for x
    x = 19,741,210,859,327,700/125,985,900.80
  6. Step 6: Final answer
    x = 156,693,810.45

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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.