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Finding the Fourth Proportional to 139,420.45, 209,137.16 and 45,927.01

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Solution

The fourth proportional to 139,420.45, 209,137.16 and 45,927.01 is: 68,892.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,420.45 : 209,137.16 = 45,927.01 : x
  2. Step 2: Convert to fraction form
    139,420.45/209,137.16 = 45,927.01/x
  3. Step 3: Cross multiply
    139,420.45x = 209,137.16 × 45,927.01
  4. Step 4: Simplify right side
    139,420.45x = 9,605,044,438.69
  5. Step 5: Solve for x
    x = 9,605,044,438.69/139,420.45
  6. Step 6: Final answer
    x = 68,892.65

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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.