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Finding the Fourth Proportional to 101,012, 139,397.36 and 55,691.60

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Solution

The fourth proportional to 101,012, 139,397.36 and 55,691.60 is: 76,854.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,012 : 139,397.36 = 55,691.60 : x
  2. Step 2: Convert to fraction form
    101,012/139,397.36 = 55,691.60/x
  3. Step 3: Cross multiply
    101,012x = 139,397.36 × 55,691.60
  4. Step 4: Simplify right side
    101,012x = 7,763,262,014.18
  5. Step 5: Solve for x
    x = 7,763,262,014.18/101,012
  6. Step 6: Final answer
    x = 76,854.85

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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.