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Finding the Fourth Proportional to 245,894.67, 339,366.96 and 138,485.70

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Solution

The fourth proportional to 245,894.67, 339,366.96 and 138,485.70 is: 191,128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,894.67 : 339,366.96 = 138,485.70 : x
  2. Step 2: Convert to fraction form
    245,894.67/339,366.96 = 138,485.70/x
  3. Step 3: Cross multiply
    245,894.67x = 339,366.96 × 138,485.70
  4. Step 4: Simplify right side
    245,894.67x = 46,997,471,012.47
  5. Step 5: Solve for x
    x = 46,997,471,012.47/245,894.67
  6. Step 6: Final answer
    x = 191,128.47

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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.