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Finding the Fourth Proportional to 139,466.40, 208,892.40 and 121,034.40

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Solution

The fourth proportional to 139,466.40, 208,892.40 and 121,034.40 is: 181,285.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,466.40 : 208,892.40 = 121,034.40 : x
  2. Step 2: Convert to fraction form
    139,466.40/208,892.40 = 121,034.40/x
  3. Step 3: Cross multiply
    139,466.40x = 208,892.40 × 121,034.40
  4. Step 4: Simplify right side
    139,466.40x = 25,283,166,298.56
  5. Step 5: Solve for x
    x = 25,283,166,298.56/139,466.40
  6. Step 6: Final answer
    x = 181,285.00

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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.