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Finding the Fourth Proportional to 139,929.16, 193,101.96 and 76,266.76

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Solution

The fourth proportional to 139,929.16, 193,101.96 and 76,266.76 is: 105,247.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,929.16 : 193,101.96 = 76,266.76 : x
  2. Step 2: Convert to fraction form
    139,929.16/193,101.96 = 76,266.76/x
  3. Step 3: Cross multiply
    139,929.16x = 193,101.96 × 76,266.76
  4. Step 4: Simplify right side
    139,929.16x = 14,727,260,838.85
  5. Step 5: Solve for x
    x = 14,727,260,838.85/139,929.16
  6. Step 6: Final answer
    x = 105,247.98

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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.