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Finding the Fourth Proportional to 268,981.62, 403,471.80 and 81,993.12

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Solution

The fourth proportional to 268,981.62, 403,471.80 and 81,993.12 is: 122,989.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,981.62 : 403,471.80 = 81,993.12 : x
  2. Step 2: Convert to fraction form
    268,981.62/403,471.80 = 81,993.12/x
  3. Step 3: Cross multiply
    268,981.62x = 403,471.80 × 81,993.12
  4. Step 4: Simplify right side
    268,981.62x = 33,081,911,714.02
  5. Step 5: Solve for x
    x = 33,081,911,714.02/268,981.62
  6. Step 6: Final answer
    x = 122,989.49

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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.