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Finding the Fourth Proportional to 72,406,108.80, 108,598,665.60 and 21,282,796.80

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Solution

The fourth proportional to 72,406,108.80, 108,598,665.60 and 21,282,796.80 is: 31,921,109.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,406,108.80 : 108,598,665.60 = 21,282,796.80 : x
  2. Step 2: Convert to fraction form
    72,406,108.80/108,598,665.60 = 21,282,796.80/x
  3. Step 3: Cross multiply
    72,406,108.80x = 108,598,665.60 × 21,282,796.80
  4. Step 4: Simplify right side
    72,406,108.80x = 2,311,283,332,715,950
  5. Step 5: Solve for x
    x = 2,311,283,332,715,950/72,406,108.80
  6. Step 6: Final answer
    x = 31,921,109.57

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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.