Home / 138,238,669.20-207,356,583.60-79,909,232.70

Finding the Fourth Proportional to 138,238,669.20, 207,356,583.60 and 79,909,232.70

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Solution

The fourth proportional to 138,238,669.20, 207,356,583.60 and 79,909,232.70 is: 119,863,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238,669.20 : 207,356,583.60 = 79,909,232.70 : x
  2. Step 2: Convert to fraction form
    138,238,669.20/207,356,583.60 = 79,909,232.70/x
  3. Step 3: Cross multiply
    138,238,669.20x = 207,356,583.60 × 79,909,232.70
  4. Step 4: Simplify right side
    138,238,669.20x = 16,569,705,490,769,404
  5. Step 5: Solve for x
    x = 16,569,705,490,769,404/138,238,669.20
  6. Step 6: Final answer
    x = 119,863,028.10

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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.