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Finding the Fourth Proportional to 139,481.36, 209,326.80 and 72,938.24

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Solution

The fourth proportional to 139,481.36, 209,326.80 and 72,938.24 is: 109,462.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,481.36 : 209,326.80 = 72,938.24 : x
  2. Step 2: Convert to fraction form
    139,481.36/209,326.80 = 72,938.24/x
  3. Step 3: Cross multiply
    139,481.36x = 209,326.80 × 72,938.24
  4. Step 4: Simplify right side
    139,481.36x = 15,267,928,376.83
  5. Step 5: Solve for x
    x = 15,267,928,376.83/139,481.36
  6. Step 6: Final answer
    x = 109,462.14

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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.