Home / 139,260.18-192,188.55-78,830.64

Finding the Fourth Proportional to 139,260.18, 192,188.55 and 78,830.64

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Solution

The fourth proportional to 139,260.18, 192,188.55 and 78,830.64 is: 108,791.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,260.18 : 192,188.55 = 78,830.64 : x
  2. Step 2: Convert to fraction form
    139,260.18/192,188.55 = 78,830.64/x
  3. Step 3: Cross multiply
    139,260.18x = 192,188.55 × 78,830.64
  4. Step 4: Simplify right side
    139,260.18x = 15,150,346,397.17
  5. Step 5: Solve for x
    x = 15,150,346,397.17/139,260.18
  6. Step 6: Final answer
    x = 108,791.66

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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.