Home / 139,856.20-193,000.98-76,193.80

Finding the Fourth Proportional to 139,856.20, 193,000.98 and 76,193.80

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Solution

The fourth proportional to 139,856.20, 193,000.98 and 76,193.80 is: 105,147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,856.20 : 193,000.98 = 76,193.80 : x
  2. Step 2: Convert to fraction form
    139,856.20/193,000.98 = 76,193.80/x
  3. Step 3: Cross multiply
    139,856.20x = 193,000.98 × 76,193.80
  4. Step 4: Simplify right side
    139,856.20x = 14,705,478,069.92
  5. Step 5: Solve for x
    x = 14,705,478,069.92/139,856.20
  6. Step 6: Final answer
    x = 105,147.13

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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.