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Finding the Fourth Proportional to 112,706.68, 155,535.44 and 61,719.88

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Solution

The fourth proportional to 112,706.68, 155,535.44 and 61,719.88 is: 85,173.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,706.68 : 155,535.44 = 61,719.88 : x
  2. Step 2: Convert to fraction form
    112,706.68/155,535.44 = 61,719.88/x
  3. Step 3: Cross multiply
    112,706.68x = 155,535.44 × 61,719.88
  4. Step 4: Simplify right side
    112,706.68x = 9,599,628,692.55
  5. Step 5: Solve for x
    x = 9,599,628,692.55/112,706.68
  6. Step 6: Final answer
    x = 85,173.56

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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.