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Finding the Fourth Proportional to 245,412.31, 368,107.92 and 76,928.86

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Solution

The fourth proportional to 245,412.31, 368,107.92 and 76,928.86 is: 115,389.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,412.31 : 368,107.92 = 76,928.86 : x
  2. Step 2: Convert to fraction form
    245,412.31/368,107.92 = 76,928.86/x
  3. Step 3: Cross multiply
    245,412.31x = 368,107.92 × 76,928.86
  4. Step 4: Simplify right side
    245,412.31x = 28,318,122,642.57
  5. Step 5: Solve for x
    x = 28,318,122,642.57/245,412.31
  6. Step 6: Final answer
    x = 115,389.98

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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.