Home / 100,820.52-139,140.90-55,507.32

Finding the Fourth Proportional to 100,820.52, 139,140.90 and 55,507.32

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Solution

The fourth proportional to 100,820.52, 139,140.90 and 55,507.32 is: 76,604.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,820.52 : 139,140.90 = 55,507.32 : x
  2. Step 2: Convert to fraction form
    100,820.52/139,140.90 = 55,507.32/x
  3. Step 3: Cross multiply
    100,820.52x = 139,140.90 × 55,507.32
  4. Step 4: Simplify right side
    100,820.52x = 7,723,338,461.39
  5. Step 5: Solve for x
    x = 7,723,338,461.39/100,820.52
  6. Step 6: Final answer
    x = 76,604.83

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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.