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Finding the Fourth Proportional to 101,097.10, 139,515.78 and 55,777.60

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Solution

The fourth proportional to 101,097.10, 139,515.78 and 55,777.60 is: 76,974.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,097.10 : 139,515.78 = 55,777.60 : x
  2. Step 2: Convert to fraction form
    101,097.10/139,515.78 = 55,777.60/x
  3. Step 3: Cross multiply
    101,097.10x = 139,515.78 × 55,777.60
  4. Step 4: Simplify right side
    101,097.10x = 7,781,855,370.53
  5. Step 5: Solve for x
    x = 7,781,855,370.53/101,097.10
  6. Step 6: Final answer
    x = 76,974.07

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1.5x scale

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.