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Finding the Fourth Proportional to 139,240.40, 208,860.60 and 92,001.20

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Solution

The fourth proportional to 139,240.40, 208,860.60 and 92,001.20 is: 138,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,240.40 : 208,860.60 = 92,001.20 : x
  2. Step 2: Convert to fraction form
    139,240.40/208,860.60 = 92,001.20/x
  3. Step 3: Cross multiply
    139,240.40x = 208,860.60 × 92,001.20
  4. Step 4: Simplify right side
    139,240.40x = 19,215,425,832.72
  5. Step 5: Solve for x
    x = 19,215,425,832.72/139,240.40
  6. Step 6: Final answer
    x = 138,001.80

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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.