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Finding the Fourth Proportional to 100,895.76, 139,237.11 and 55,573.93

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Solution

The fourth proportional to 100,895.76, 139,237.11 and 55,573.93 is: 76,692.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.76 : 139,237.11 = 55,573.93 : x
  2. Step 2: Convert to fraction form
    100,895.76/139,237.11 = 55,573.93/x
  3. Step 3: Cross multiply
    100,895.76x = 139,237.11 × 55,573.93
  4. Step 4: Simplify right side
    100,895.76x = 7,737,953,578.59
  5. Step 5: Solve for x
    x = 7,737,953,578.59/100,895.76
  6. Step 6: Final answer
    x = 76,692.55

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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.