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Finding the Fourth Proportional to 72,699.76, 100,326.09 and 40,868.38

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Solution

The fourth proportional to 72,699.76, 100,326.09 and 40,868.38 is: 56,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,699.76 : 100,326.09 = 40,868.38 : x
  2. Step 2: Convert to fraction form
    72,699.76/100,326.09 = 40,868.38/x
  3. Step 3: Cross multiply
    72,699.76x = 100,326.09 × 40,868.38
  4. Step 4: Simplify right side
    72,699.76x = 4,100,164,770.03
  5. Step 5: Solve for x
    x = 4,100,164,770.03/72,699.76
  6. Step 6: Final answer
    x = 56,398.60

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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.