Home / 139,003,781.40-208,505,672.10-81,608,153.40

Finding the Fourth Proportional to 139,003,781.40, 208,505,672.10 and 81,608,153.40

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Solution

The fourth proportional to 139,003,781.40, 208,505,672.10 and 81,608,153.40 is: 122,412,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,003,781.40 : 208,505,672.10 = 81,608,153.40 : x
  2. Step 2: Convert to fraction form
    139,003,781.40/208,505,672.10 = 81,608,153.40/x
  3. Step 3: Cross multiply
    139,003,781.40x = 208,505,672.10 × 81,608,153.40
  4. Step 4: Simplify right side
    139,003,781.40x = 17,015,762,873,506,900
  5. Step 5: Solve for x
    x = 17,015,762,873,506,900/139,003,781.40
  6. Step 6: Final answer
    x = 122,412,230.10

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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.