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Finding the Fourth Proportional to 139,207.20, 208,810.80 and 50,460.60

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Solution

The fourth proportional to 139,207.20, 208,810.80 and 50,460.60 is: 75,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,207.20 : 208,810.80 = 50,460.60 : x
  2. Step 2: Convert to fraction form
    139,207.20/208,810.80 = 50,460.60/x
  3. Step 3: Cross multiply
    139,207.20x = 208,810.80 × 50,460.60
  4. Step 4: Simplify right side
    139,207.20x = 10,536,718,254.48
  5. Step 5: Solve for x
    x = 10,536,718,254.48/139,207.20
  6. Step 6: Final answer
    x = 75,690.90

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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.