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Finding the Fourth Proportional to 139,898.07, 209,769.35 and 56,694.87

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Solution

The fourth proportional to 139,898.07, 209,769.35 and 56,694.87 is: 85,010.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,898.07 : 209,769.35 = 56,694.87 : x
  2. Step 2: Convert to fraction form
    139,898.07/209,769.35 = 56,694.87/x
  3. Step 3: Cross multiply
    139,898.07x = 209,769.35 × 56,694.87
  4. Step 4: Simplify right side
    139,898.07x = 11,892,845,744.76
  5. Step 5: Solve for x
    x = 11,892,845,744.76/139,898.07
  6. Step 6: Final answer
    x = 85,010.79

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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.