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Finding the Fourth Proportional to 139,038.55, 208,555.66 and 33,856.63

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Solution

The fourth proportional to 139,038.55, 208,555.66 and 33,856.63 is: 50,784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,038.55 : 208,555.66 = 33,856.63 : x
  2. Step 2: Convert to fraction form
    139,038.55/208,555.66 = 33,856.63/x
  3. Step 3: Cross multiply
    139,038.55x = 208,555.66 × 33,856.63
  4. Step 4: Simplify right side
    139,038.55x = 7,060,991,815.03
  5. Step 5: Solve for x
    x = 7,060,991,815.03/139,038.55
  6. Step 6: Final answer
    x = 50,784.42

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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.