Home / 138,398,412.20-207,455,900.70-80,861,066.60

Finding the Fourth Proportional to 138,398,412.20, 207,455,900.70 and 80,861,066.60

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Solution

The fourth proportional to 138,398,412.20, 207,455,900.70 and 80,861,066.60 is: 121,208,799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398,412.20 : 207,455,900.70 = 80,861,066.60 : x
  2. Step 2: Convert to fraction form
    138,398,412.20/207,455,900.70 = 80,861,066.60/x
  3. Step 3: Cross multiply
    138,398,412.20x = 207,455,900.70 × 80,861,066.60
  4. Step 4: Simplify right side
    138,398,412.20x = 16,775,105,403,065,684
  5. Step 5: Solve for x
    x = 16,775,105,403,065,684/138,398,412.20
  6. Step 6: Final answer
    x = 121,208,799.55

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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.