Home / 72,612.33-100,200.08-40,780.55

Finding the Fourth Proportional to 72,612.33, 100,200.08 and 40,780.55

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Solution

The fourth proportional to 72,612.33, 100,200.08 and 40,780.55 is: 56,274.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.33 : 100,200.08 = 40,780.55 : x
  2. Step 2: Convert to fraction form
    72,612.33/100,200.08 = 40,780.55/x
  3. Step 3: Cross multiply
    72,612.33x = 100,200.08 × 40,780.55
  4. Step 4: Simplify right side
    72,612.33x = 4,086,213,667.54
  5. Step 5: Solve for x
    x = 4,086,213,667.54/72,612.33
  6. Step 6: Final answer
    x = 56,274.38

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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.