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Finding the Fourth Proportional to 76,804.48, 115,103.04 and 39,894.40

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Solution

The fourth proportional to 76,804.48, 115,103.04 and 39,894.40 is: 59,787.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,804.48 : 115,103.04 = 39,894.40 : x
  2. Step 2: Convert to fraction form
    76,804.48/115,103.04 = 39,894.40/x
  3. Step 3: Cross multiply
    76,804.48x = 115,103.04 × 39,894.40
  4. Step 4: Simplify right side
    76,804.48x = 4,591,966,718.98
  5. Step 5: Solve for x
    x = 4,591,966,718.98/76,804.48
  6. Step 6: Final answer
    x = 59,787.75

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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.