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Finding the Fourth Proportional to 139,873.70, 209,898.03 and 56,767.70

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Solution

The fourth proportional to 139,873.70, 209,898.03 and 56,767.70 is: 85,187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,873.70 : 209,898.03 = 56,767.70 : x
  2. Step 2: Convert to fraction form
    139,873.70/209,898.03 = 56,767.70/x
  3. Step 3: Cross multiply
    139,873.70x = 209,898.03 × 56,767.70
  4. Step 4: Simplify right side
    139,873.70x = 11,915,428,397.63
  5. Step 5: Solve for x
    x = 11,915,428,397.63/139,873.70
  6. Step 6: Final answer
    x = 85,187.05

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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.