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Finding the Fourth Proportional to 139,771.32, 192,885.32 and 76,109.36

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Solution

The fourth proportional to 139,771.32, 192,885.32 and 76,109.36 is: 105,031.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,771.32 : 192,885.32 = 76,109.36 : x
  2. Step 2: Convert to fraction form
    139,771.32/192,885.32 = 76,109.36/x
  3. Step 3: Cross multiply
    139,771.32x = 192,885.32 × 76,109.36
  4. Step 4: Simplify right side
    139,771.32x = 14,680,378,258.60
  5. Step 5: Solve for x
    x = 14,680,378,258.60/139,771.32
  6. Step 6: Final answer
    x = 105,031.41

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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.