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Finding the Fourth Proportional to 238,994.32, 358,522.80 and 81,180.40

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Solution

The fourth proportional to 238,994.32, 358,522.80 and 81,180.40 is: 121,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,994.32 : 358,522.80 = 81,180.40 : x
  2. Step 2: Convert to fraction form
    238,994.32/358,522.80 = 81,180.40/x
  3. Step 3: Cross multiply
    238,994.32x = 358,522.80 × 81,180.40
  4. Step 4: Simplify right side
    238,994.32x = 29,105,024,313.12
  5. Step 5: Solve for x
    x = 29,105,024,313.12/238,994.32
  6. Step 6: Final answer
    x = 121,781.24

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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.