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Finding the Fourth Proportional to 72,599.79, 100,185.12 and 40,770.03

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Solution

The fourth proportional to 72,599.79, 100,185.12 and 40,770.03 is: 56,261.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,599.79 : 100,185.12 = 40,770.03 : x
  2. Step 2: Convert to fraction form
    72,599.79/100,185.12 = 40,770.03/x
  3. Step 3: Cross multiply
    72,599.79x = 100,185.12 × 40,770.03
  4. Step 4: Simplify right side
    72,599.79x = 4,084,550,347.95
  5. Step 5: Solve for x
    x = 4,084,550,347.95/72,599.79
  6. Step 6: Final answer
    x = 56,261.19

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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.