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Finding the Fourth Proportional to 251,404.70, 377,107.05 and 139,430.30

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Solution

The fourth proportional to 251,404.70, 377,107.05 and 139,430.30 is: 209,145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,404.70 : 377,107.05 = 139,430.30 : x
  2. Step 2: Convert to fraction form
    251,404.70/377,107.05 = 139,430.30/x
  3. Step 3: Cross multiply
    251,404.70x = 377,107.05 × 139,430.30
  4. Step 4: Simplify right side
    251,404.70x = 52,580,149,113.62
  5. Step 5: Solve for x
    x = 52,580,149,113.62/251,404.70
  6. Step 6: Final answer
    x = 209,145.45

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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.