Home / 72,555.78-100,119.33-40,728.18

Finding the Fourth Proportional to 72,555.78, 100,119.33 and 40,728.18

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Solution

The fourth proportional to 72,555.78, 100,119.33 and 40,728.18 is: 56,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,555.78 : 100,119.33 = 40,728.18 : x
  2. Step 2: Convert to fraction form
    72,555.78/100,119.33 = 40,728.18/x
  3. Step 3: Cross multiply
    72,555.78x = 100,119.33 × 40,728.18
  4. Step 4: Simplify right side
    72,555.78x = 4,077,678,093.72
  5. Step 5: Solve for x
    x = 4,077,678,093.72/72,555.78
  6. Step 6: Final answer
    x = 56,200.60

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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.