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Finding the Fourth Proportional to 78,960.52, 118,440.78 and 39,477.88

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Solution

The fourth proportional to 78,960.52, 118,440.78 and 39,477.88 is: 59,216.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,960.52 : 118,440.78 = 39,477.88 : x
  2. Step 2: Convert to fraction form
    78,960.52/118,440.78 = 39,477.88/x
  3. Step 3: Cross multiply
    78,960.52x = 118,440.78 × 39,477.88
  4. Step 4: Simplify right side
    78,960.52x = 4,675,790,899.95
  5. Step 5: Solve for x
    x = 4,675,790,899.95/78,960.52
  6. Step 6: Final answer
    x = 59,216.82

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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.