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Finding the Fourth Proportional to 78,960.75, 118,449.09 and 25,650.51

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Solution

The fourth proportional to 78,960.75, 118,449.09 and 25,650.51 is: 38,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,960.75 : 118,449.09 = 25,650.51 : x
  2. Step 2: Convert to fraction form
    78,960.75/118,449.09 = 25,650.51/x
  3. Step 3: Cross multiply
    78,960.75x = 118,449.09 × 25,650.51
  4. Step 4: Simplify right side
    78,960.75x = 3,038,279,567.54
  5. Step 5: Solve for x
    x = 3,038,279,567.54/78,960.75
  6. Step 6: Final answer
    x = 38,478.35

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1.5x scale

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.