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Finding the Fourth Proportional to 139,931.74, 193,111.05 and 79,512.67

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Solution

The fourth proportional to 139,931.74, 193,111.05 and 79,512.67 is: 109,730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,931.74 : 193,111.05 = 79,512.67 : x
  2. Step 2: Convert to fraction form
    139,931.74/193,111.05 = 79,512.67/x
  3. Step 3: Cross multiply
    139,931.74x = 193,111.05 × 79,512.67
  4. Step 4: Simplify right side
    139,931.74x = 15,354,775,192.00
  5. Step 5: Solve for x
    x = 15,354,775,192.00/139,931.74
  6. Step 6: Final answer
    x = 109,730.47

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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.