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Finding the Fourth Proportional to 78,975.80, 108,951.60 and 47,126.28

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Solution

The fourth proportional to 78,975.80, 108,951.60 and 47,126.28 is: 65,013.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,975.80 : 108,951.60 = 47,126.28 : x
  2. Step 2: Convert to fraction form
    78,975.80/108,951.60 = 47,126.28/x
  3. Step 3: Cross multiply
    78,975.80x = 108,951.60 × 47,126.28
  4. Step 4: Simplify right side
    78,975.80x = 5,134,483,608.05
  5. Step 5: Solve for x
    x = 5,134,483,608.05/78,975.80
  6. Step 6: Final answer
    x = 65,013.38

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1.5x scale

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.