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Finding the Fourth Proportional to 139,008.60, 208,512.90 and 69,024.60

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Solution

The fourth proportional to 139,008.60, 208,512.90 and 69,024.60 is: 103,536.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,008.60 : 208,512.90 = 69,024.60 : x
  2. Step 2: Convert to fraction form
    139,008.60/208,512.90 = 69,024.60/x
  3. Step 3: Cross multiply
    139,008.60x = 208,512.90 × 69,024.60
  4. Step 4: Simplify right side
    139,008.60x = 14,392,519,517.34
  5. Step 5: Solve for x
    x = 14,392,519,517.34/139,008.60
  6. Step 6: Final answer
    x = 103,536.90

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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.