Home / 138,812,998.34-191,554,564.02-80,072,168.78

Finding the Fourth Proportional to 138,812,998.34, 191,554,564.02 and 80,072,168.78

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Solution

The fourth proportional to 138,812,998.34, 191,554,564.02 and 80,072,168.78 is: 110,495,339.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,812,998.34 : 191,554,564.02 = 80,072,168.78 : x
  2. Step 2: Convert to fraction form
    138,812,998.34/191,554,564.02 = 80,072,168.78/x
  3. Step 3: Cross multiply
    138,812,998.34x = 191,554,564.02 × 80,072,168.78
  4. Step 4: Simplify right side
    138,812,998.34x = 15,338,189,380,788,756
  5. Step 5: Solve for x
    x = 15,338,189,380,788,756/138,812,998.34
  6. Step 6: Final answer
    x = 110,495,339.52

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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.