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Finding the Fourth Proportional to 139,087.78, 191,939.32 and 75,425.24

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Solution

The fourth proportional to 139,087.78, 191,939.32 and 75,425.24 is: 104,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,087.78 : 191,939.32 = 75,425.24 : x
  2. Step 2: Convert to fraction form
    139,087.78/191,939.32 = 75,425.24/x
  3. Step 3: Cross multiply
    139,087.78x = 191,939.32 × 75,425.24
  4. Step 4: Simplify right side
    139,087.78x = 14,477,069,276.44
  5. Step 5: Solve for x
    x = 14,477,069,276.44/139,087.78
  6. Step 6: Final answer
    x = 104,085.85

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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.