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Finding the Fourth Proportional to 143,079,459.80, 214,619,189.70 and 120,121,208.60

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Solution

The fourth proportional to 143,079,459.80, 214,619,189.70 and 120,121,208.60 is: 180,181,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,079,459.80 : 214,619,189.70 = 120,121,208.60 : x
  2. Step 2: Convert to fraction form
    143,079,459.80/214,619,189.70 = 120,121,208.60/x
  3. Step 3: Cross multiply
    143,079,459.80x = 214,619,189.70 × 120,121,208.60
  4. Step 4: Simplify right side
    143,079,459.80x = 25,780,316,455,516,668
  5. Step 5: Solve for x
    x = 25,780,316,455,516,668/143,079,459.80
  6. Step 6: Final answer
    x = 180,181,812.90

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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.