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Finding the Fourth Proportional to 245,883.92, 339,319.32 and 138,454.40

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Solution

The fourth proportional to 245,883.92, 339,319.32 and 138,454.40 is: 191,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,883.92 : 339,319.32 = 138,454.40 : x
  2. Step 2: Convert to fraction form
    245,883.92/339,319.32 = 138,454.40/x
  3. Step 3: Cross multiply
    245,883.92x = 339,319.32 × 138,454.40
  4. Step 4: Simplify right side
    245,883.92x = 46,980,252,859.01
  5. Step 5: Solve for x
    x = 46,980,252,859.01/245,883.92
  6. Step 6: Final answer
    x = 191,066.80

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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.