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Finding the Fourth Proportional to 245,429.20, 367,690.20 and 139,934.80

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Solution

The fourth proportional to 245,429.20, 367,690.20 and 139,934.80 is: 209,643.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,429.20 : 367,690.20 = 139,934.80 : x
  2. Step 2: Convert to fraction form
    245,429.20/367,690.20 = 139,934.80/x
  3. Step 3: Cross multiply
    245,429.20x = 367,690.20 × 139,934.80
  4. Step 4: Simplify right side
    245,429.20x = 51,452,654,598.96
  5. Step 5: Solve for x
    x = 51,452,654,598.96/245,429.20
  6. Step 6: Final answer
    x = 209,643.57

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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.