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Finding the Fourth Proportional to 388,558,108.86, 582,773,322.02 and 139,511,810.80

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Solution

The fourth proportional to 388,558,108.86, 582,773,322.02 and 139,511,810.80 is: 209,244,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,558,108.86 : 582,773,322.02 = 139,511,810.80 : x
  2. Step 2: Convert to fraction form
    388,558,108.86/582,773,322.02 = 139,511,810.80/x
  3. Step 3: Cross multiply
    388,558,108.86x = 582,773,322.02 × 139,511,810.80
  4. Step 4: Simplify right side
    388,558,108.86x = 81,303,761,441,759,472
  5. Step 5: Solve for x
    x = 81,303,761,441,759,472/388,558,108.86
  6. Step 6: Final answer
    x = 209,244,793.99

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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.