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Finding the Fourth Proportional to 139,872,003.80, 209,808,005.70 and 54,771,459.80

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Solution

The fourth proportional to 139,872,003.80, 209,808,005.70 and 54,771,459.80 is: 82,157,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,872,003.80 : 209,808,005.70 = 54,771,459.80 : x
  2. Step 2: Convert to fraction form
    139,872,003.80/209,808,005.70 = 54,771,459.80/x
  3. Step 3: Cross multiply
    139,872,003.80x = 209,808,005.70 × 54,771,459.80
  4. Step 4: Simplify right side
    139,872,003.80x = 11,491,490,749,915,720
  5. Step 5: Solve for x
    x = 11,491,490,749,915,720/139,872,003.80
  6. Step 6: Final answer
    x = 82,157,189.70

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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.