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Finding the Fourth Proportional to 399,807,685.96, 599,724,804.54 and 137,489,663.56

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Solution

The fourth proportional to 399,807,685.96, 599,724,804.54 and 137,489,663.56 is: 206,239,060.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,807,685.96 : 599,724,804.54 = 137,489,663.56 : x
  2. Step 2: Convert to fraction form
    399,807,685.96/599,724,804.54 = 137,489,663.56/x
  3. Step 3: Cross multiply
    399,807,685.96x = 599,724,804.54 × 137,489,663.56
  4. Step 4: Simplify right side
    399,807,685.96x = 82,455,961,604,791,360
  5. Step 5: Solve for x
    x = 82,455,961,604,791,360/399,807,685.96
  6. Step 6: Final answer
    x = 206,239,060.68

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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.