Home / 100,824.38-139,140.79-54,887.10

Finding the Fourth Proportional to 100,824.38, 139,140.79 and 54,887.10

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Solution

The fourth proportional to 100,824.38, 139,140.79 and 54,887.10 is: 75,745.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,824.38 : 139,140.79 = 54,887.10 : x
  2. Step 2: Convert to fraction form
    100,824.38/139,140.79 = 54,887.10/x
  3. Step 3: Cross multiply
    100,824.38x = 139,140.79 × 54,887.10
  4. Step 4: Simplify right side
    100,824.38x = 7,637,033,795.81
  5. Step 5: Solve for x
    x = 7,637,033,795.81/100,824.38
  6. Step 6: Final answer
    x = 75,745.90

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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.