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Finding the Fourth Proportional to 47,521,994.60, 71,312,978.21 and 20,228,243.78

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Solution

The fourth proportional to 47,521,994.60, 71,312,978.21 and 20,228,243.78 is: 30,355,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,521,994.60 : 71,312,978.21 = 20,228,243.78 : x
  2. Step 2: Convert to fraction form
    47,521,994.60/71,312,978.21 = 20,228,243.78/x
  3. Step 3: Cross multiply
    47,521,994.60x = 71,312,978.21 × 20,228,243.78
  4. Step 4: Simplify right side
    47,521,994.60x = 1,442,536,307,452,001.75
  5. Step 5: Solve for x
    x = 1,442,536,307,452,001.75/47,521,994.60
  6. Step 6: Final answer
    x = 30,355,129.66

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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.