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Finding the Fourth Proportional to 139,008,456.80, 208,580,000.40 and 57,187,800.80

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Solution

The fourth proportional to 139,008,456.80, 208,580,000.40 and 57,187,800.80 is: 85,809,394.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,008,456.80 : 208,580,000.40 = 57,187,800.80 : x
  2. Step 2: Convert to fraction form
    139,008,456.80/208,580,000.40 = 57,187,800.80/x
  3. Step 3: Cross multiply
    139,008,456.80x = 208,580,000.40 × 57,187,800.80
  4. Step 4: Simplify right side
    139,008,456.80x = 11,928,231,513,739,120
  5. Step 5: Solve for x
    x = 11,928,231,513,739,120/139,008,456.80
  6. Step 6: Final answer
    x = 85,809,394.54

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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.