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Finding the Fourth Proportional to 139,699.47, 209,402.48 and 68,523.56

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Solution

The fourth proportional to 139,699.47, 209,402.48 and 68,523.56 is: 102,713.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,699.47 : 209,402.48 = 68,523.56 : x
  2. Step 2: Convert to fraction form
    139,699.47/209,402.48 = 68,523.56/x
  3. Step 3: Cross multiply
    139,699.47x = 209,402.48 × 68,523.56
  4. Step 4: Simplify right side
    139,699.47x = 14,349,003,402.43
  5. Step 5: Solve for x
    x = 14,349,003,402.43/139,699.47
  6. Step 6: Final answer
    x = 102,713.37

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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.