Home / 72,161.55-99,580.86-40,330.71

Finding the Fourth Proportional to 72,161.55, 99,580.86 and 40,330.71

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Solution

The fourth proportional to 72,161.55, 99,580.86 and 40,330.71 is: 55,655.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.55 : 99,580.86 = 40,330.71 : x
  2. Step 2: Convert to fraction form
    72,161.55/99,580.86 = 40,330.71/x
  3. Step 3: Cross multiply
    72,161.55x = 99,580.86 × 40,330.71
  4. Step 4: Simplify right side
    72,161.55x = 4,016,166,786.21
  5. Step 5: Solve for x
    x = 4,016,166,786.21/72,161.55
  6. Step 6: Final answer
    x = 55,655.22

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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.