Home / 100,743.24-139,028.10-55,423.08

Finding the Fourth Proportional to 100,743.24, 139,028.10 and 55,423.08

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Solution

The fourth proportional to 100,743.24, 139,028.10 and 55,423.08 is: 76,485.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,743.24 : 139,028.10 = 55,423.08 : x
  2. Step 2: Convert to fraction form
    100,743.24/139,028.10 = 55,423.08/x
  3. Step 3: Cross multiply
    100,743.24x = 139,028.10 × 55,423.08
  4. Step 4: Simplify right side
    100,743.24x = 7,705,365,508.55
  5. Step 5: Solve for x
    x = 7,705,365,508.55/100,743.24
  6. Step 6: Final answer
    x = 76,485.19

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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.