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Finding the Fourth Proportional to 139,148.88, 208,753.56 and 45,651.12

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Solution

The fourth proportional to 139,148.88, 208,753.56 and 45,651.12 is: 68,486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,148.88 : 208,753.56 = 45,651.12 : x
  2. Step 2: Convert to fraction form
    139,148.88/208,753.56 = 45,651.12/x
  3. Step 3: Cross multiply
    139,148.88x = 208,753.56 × 45,651.12
  4. Step 4: Simplify right side
    139,148.88x = 9,529,833,817.99
  5. Step 5: Solve for x
    x = 9,529,833,817.99/139,148.88
  6. Step 6: Final answer
    x = 68,486.60

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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.