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Finding the Fourth Proportional to 139,438.50, 192,394.35 and 79,003.86

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Solution

The fourth proportional to 139,438.50, 192,394.35 and 79,003.86 is: 109,007.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,438.50 : 192,394.35 = 79,003.86 : x
  2. Step 2: Convert to fraction form
    139,438.50/192,394.35 = 79,003.86/x
  3. Step 3: Cross multiply
    139,438.50x = 192,394.35 × 79,003.86
  4. Step 4: Simplify right side
    139,438.50x = 15,199,896,292.19
  5. Step 5: Solve for x
    x = 15,199,896,292.19/139,438.50
  6. Step 6: Final answer
    x = 109,007.89

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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.