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Finding the Fourth Proportional to 78,149.80, 117,155.58 and 36,585.64

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Solution

The fourth proportional to 78,149.80, 117,155.58 and 36,585.64 is: 54,846.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,149.80 : 117,155.58 = 36,585.64 : x
  2. Step 2: Convert to fraction form
    78,149.80/117,155.58 = 36,585.64/x
  3. Step 3: Cross multiply
    78,149.80x = 117,155.58 × 36,585.64
  4. Step 4: Simplify right side
    78,149.80x = 4,286,211,873.87
  5. Step 5: Solve for x
    x = 4,286,211,873.87/78,149.80
  6. Step 6: Final answer
    x = 54,846.10

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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.