Home / 139,001.45-191,819.91-78,569.96

Finding the Fourth Proportional to 139,001.45, 191,819.91 and 78,569.96

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Solution

The fourth proportional to 139,001.45, 191,819.91 and 78,569.96 is: 108,425.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,001.45 : 191,819.91 = 78,569.96 : x
  2. Step 2: Convert to fraction form
    139,001.45/191,819.91 = 78,569.96/x
  3. Step 3: Cross multiply
    139,001.45x = 191,819.91 × 78,569.96
  4. Step 4: Simplify right side
    139,001.45x = 15,071,283,135.45
  5. Step 5: Solve for x
    x = 15,071,283,135.45/139,001.45
  6. Step 6: Final answer
    x = 108,425.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.