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Finding the Fourth Proportional to 245,367.86, 338,607.69 and 137,938.10

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Solution

The fourth proportional to 245,367.86, 338,607.69 and 137,938.10 is: 190,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,367.86 : 338,607.69 = 137,938.10 : x
  2. Step 2: Convert to fraction form
    245,367.86/338,607.69 = 137,938.10/x
  3. Step 3: Cross multiply
    245,367.86x = 338,607.69 × 137,938.10
  4. Step 4: Simplify right side
    245,367.86x = 46,706,901,403.99
  5. Step 5: Solve for x
    x = 46,706,901,403.99/245,367.86
  6. Step 6: Final answer
    x = 190,354.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.