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Finding the Fourth Proportional to 221,290,357.96, 331,930,978.70 and 73,748,632.46

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Solution

The fourth proportional to 221,290,357.96, 331,930,978.70 and 73,748,632.46 is: 110,621,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,290,357.96 : 331,930,978.70 = 73,748,632.46 : x
  2. Step 2: Convert to fraction form
    221,290,357.96/331,930,978.70 = 73,748,632.46/x
  3. Step 3: Cross multiply
    221,290,357.96x = 331,930,978.70 × 73,748,632.46
  4. Step 4: Simplify right side
    221,290,357.96x = 24,479,455,750,234,384
  5. Step 5: Solve for x
    x = 24,479,455,750,234,384/221,290,357.96
  6. Step 6: Final answer
    x = 110,621,429.58

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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.