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Finding the Fourth Proportional to 78,846.60, 118,269.90 and 53,963.40

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Solution

The fourth proportional to 78,846.60, 118,269.90 and 53,963.40 is: 80,945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,846.60 : 118,269.90 = 53,963.40 : x
  2. Step 2: Convert to fraction form
    78,846.60/118,269.90 = 53,963.40/x
  3. Step 3: Cross multiply
    78,846.60x = 118,269.90 × 53,963.40
  4. Step 4: Simplify right side
    78,846.60x = 6,382,245,921.66
  5. Step 5: Solve for x
    x = 6,382,245,921.66/78,846.60
  6. Step 6: Final answer
    x = 80,945.10

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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.