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Finding the Fourth Proportional to 268,381.20, 402,571.80 and 90,845.40

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Solution

The fourth proportional to 268,381.20, 402,571.80 and 90,845.40 is: 136,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,381.20 : 402,571.80 = 90,845.40 : x
  2. Step 2: Convert to fraction form
    268,381.20/402,571.80 = 90,845.40/x
  3. Step 3: Cross multiply
    268,381.20x = 402,571.80 × 90,845.40
  4. Step 4: Simplify right side
    268,381.20x = 36,571,796,199.72
  5. Step 5: Solve for x
    x = 36,571,796,199.72/268,381.20
  6. Step 6: Final answer
    x = 136,268.10

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1.5x scale

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.