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Finding the Fourth Proportional to 245,139.60, 367,709.40 and 139,969.20

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Solution

The fourth proportional to 245,139.60, 367,709.40 and 139,969.20 is: 209,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,139.60 : 367,709.40 = 139,969.20 : x
  2. Step 2: Convert to fraction form
    245,139.60/367,709.40 = 139,969.20/x
  3. Step 3: Cross multiply
    245,139.60x = 367,709.40 × 139,969.20
  4. Step 4: Simplify right side
    245,139.60x = 51,467,990,550.48
  5. Step 5: Solve for x
    x = 51,467,990,550.48/245,139.60
  6. Step 6: Final answer
    x = 209,953.80

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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.