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Finding the Fourth Proportional to 101,281.56, 139,766.22 and 55,957.20

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Solution

The fourth proportional to 101,281.56, 139,766.22 and 55,957.20 is: 77,219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,281.56 : 139,766.22 = 55,957.20 : x
  2. Step 2: Convert to fraction form
    101,281.56/139,766.22 = 55,957.20/x
  3. Step 3: Cross multiply
    101,281.56x = 139,766.22 × 55,957.20
  4. Step 4: Simplify right side
    101,281.56x = 7,820,926,325.78
  5. Step 5: Solve for x
    x = 7,820,926,325.78/101,281.56
  6. Step 6: Final answer
    x = 77,219.65

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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.