Home / 138,398,416.20-207,455,906.70-80,861,070.60

Finding the Fourth Proportional to 138,398,416.20, 207,455,906.70 and 80,861,070.60

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Solution

The fourth proportional to 138,398,416.20, 207,455,906.70 and 80,861,070.60 is: 121,208,805.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398,416.20 : 207,455,906.70 = 80,861,070.60 : x
  2. Step 2: Convert to fraction form
    138,398,416.20/207,455,906.70 = 80,861,070.60/x
  3. Step 3: Cross multiply
    138,398,416.20x = 207,455,906.70 × 80,861,070.60
  4. Step 4: Simplify right side
    138,398,416.20x = 16,775,106,718,055,710
  5. Step 5: Solve for x
    x = 16,775,106,718,055,710/138,398,416.20
  6. Step 6: Final answer
    x = 121,208,805.55

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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.