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Finding the Fourth Proportional to 158,978,131.65, 219,413,056.37 and 89,369,245.89

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Solution

The fourth proportional to 158,978,131.65, 219,413,056.37 and 89,369,245.89 is: 123,342,620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,978,131.65 : 219,413,056.37 = 89,369,245.89 : x
  2. Step 2: Convert to fraction form
    158,978,131.65/219,413,056.37 = 89,369,245.89/x
  3. Step 3: Cross multiply
    158,978,131.65x = 219,413,056.37 × 89,369,245.89
  4. Step 4: Simplify right side
    158,978,131.65x = 19,608,779,385,760,116
  5. Step 5: Solve for x
    x = 19,608,779,385,760,116/158,978,131.65
  6. Step 6: Final answer
    x = 123,342,620.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.