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Finding the Fourth Proportional to 139,271.40, 192,193.50 and 75,607.56

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Solution

The fourth proportional to 139,271.40, 192,193.50 and 75,607.56 is: 104,337.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,271.40 : 192,193.50 = 75,607.56 : x
  2. Step 2: Convert to fraction form
    139,271.40/192,193.50 = 75,607.56/x
  3. Step 3: Cross multiply
    139,271.40x = 192,193.50 × 75,607.56
  4. Step 4: Simplify right side
    139,271.40x = 14,531,281,582.86
  5. Step 5: Solve for x
    x = 14,531,281,582.86/139,271.40
  6. Step 6: Final answer
    x = 104,337.87

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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.