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Finding the Fourth Proportional to 101,101.05, 139,518.12 and 55,780.95

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Solution

The fourth proportional to 101,101.05, 139,518.12 and 55,780.95 is: 76,976.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,101.05 : 139,518.12 = 55,780.95 : x
  2. Step 2: Convert to fraction form
    101,101.05/139,518.12 = 55,780.95/x
  3. Step 3: Cross multiply
    101,101.05x = 139,518.12 × 55,780.95
  4. Step 4: Simplify right side
    101,101.05x = 7,782,453,275.81
  5. Step 5: Solve for x
    x = 7,782,453,275.81/101,101.05
  6. Step 6: Final answer
    x = 76,976.98

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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.