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Finding the Fourth Proportional to 268,577.80, 402,924.30 and 81,608.20

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Solution

The fourth proportional to 268,577.80, 402,924.30 and 81,608.20 is: 122,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,577.80 : 402,924.30 = 81,608.20 : x
  2. Step 2: Convert to fraction form
    268,577.80/402,924.30 = 81,608.20/x
  3. Step 3: Cross multiply
    268,577.80x = 402,924.30 × 81,608.20
  4. Step 4: Simplify right side
    268,577.80x = 32,881,926,859.26
  5. Step 5: Solve for x
    x = 32,881,926,859.26/268,577.80
  6. Step 6: Final answer
    x = 122,429.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.