Home / 72,780.20-100,382.90-50,126.36

Finding the Fourth Proportional to 72,780.20, 100,382.90 and 50,126.36

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Solution

The fourth proportional to 72,780.20, 100,382.90 and 50,126.36 is: 69,137.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,780.20 : 100,382.90 = 50,126.36 : x
  2. Step 2: Convert to fraction form
    72,780.20/100,382.90 = 50,126.36/x
  3. Step 3: Cross multiply
    72,780.20x = 100,382.90 × 50,126.36
  4. Step 4: Simplify right side
    72,780.20x = 5,031,829,383.24
  5. Step 5: Solve for x
    x = 5,031,829,383.24/72,780.20
  6. Step 6: Final answer
    x = 69,137.34

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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.