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Finding the Fourth Proportional to 139,383.86, 209,076.08 and 34,203.11

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Solution

The fourth proportional to 139,383.86, 209,076.08 and 34,203.11 is: 51,304.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,383.86 : 209,076.08 = 34,203.11 : x
  2. Step 2: Convert to fraction form
    139,383.86/209,076.08 = 34,203.11/x
  3. Step 3: Cross multiply
    139,383.86x = 209,076.08 × 34,203.11
  4. Step 4: Simplify right side
    139,383.86x = 7,151,050,946.21
  5. Step 5: Solve for x
    x = 7,151,050,946.21/139,383.86
  6. Step 6: Final answer
    x = 51,304.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.