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Finding the Fourth Proportional to 101,302.45, 139,790.39 and 55,980

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Solution

The fourth proportional to 101,302.45, 139,790.39 and 55,980 is: 77,248.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,302.45 : 139,790.39 = 55,980 : x
  2. Step 2: Convert to fraction form
    101,302.45/139,790.39 = 55,980/x
  3. Step 3: Cross multiply
    101,302.45x = 139,790.39 × 55,980
  4. Step 4: Simplify right side
    101,302.45x = 7,825,465,752.30
  5. Step 5: Solve for x
    x = 7,825,465,752.30/101,302.45
  6. Step 6: Final answer
    x = 77,248.54

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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.