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Finding the Fourth Proportional to 72,580.46, 100,155.48 and 40,743.32

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Solution

The fourth proportional to 72,580.46, 100,155.48 and 40,743.32 is: 56,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,580.46 : 100,155.48 = 40,743.32 : x
  2. Step 2: Convert to fraction form
    72,580.46/100,155.48 = 40,743.32/x
  3. Step 3: Cross multiply
    72,580.46x = 100,155.48 × 40,743.32
  4. Step 4: Simplify right side
    72,580.46x = 4,080,666,771.39
  5. Step 5: Solve for x
    x = 4,080,666,771.39/72,580.46
  6. Step 6: Final answer
    x = 56,222.66

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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.