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Finding the Fourth Proportional to 268,374.40, 402,561.60 and 81,395.20

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Solution

The fourth proportional to 268,374.40, 402,561.60 and 81,395.20 is: 122,092.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,374.40 : 402,561.60 = 81,395.20 : x
  2. Step 2: Convert to fraction form
    268,374.40/402,561.60 = 81,395.20/x
  3. Step 3: Cross multiply
    268,374.40x = 402,561.60 × 81,395.20
  4. Step 4: Simplify right side
    268,374.40x = 32,766,581,944.32
  5. Step 5: Solve for x
    x = 32,766,581,944.32/268,374.40
  6. Step 6: Final answer
    x = 122,092.80

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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.