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Finding the Fourth Proportional to 214,970.40, 322,225.20 and 81,799.20

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Solution

The fourth proportional to 214,970.40, 322,225.20 and 81,799.20 is: 122,611.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,970.40 : 322,225.20 = 81,799.20 : x
  2. Step 2: Convert to fraction form
    214,970.40/322,225.20 = 81,799.20/x
  3. Step 3: Cross multiply
    214,970.40x = 322,225.20 × 81,799.20
  4. Step 4: Simplify right side
    214,970.40x = 26,357,763,579.84
  5. Step 5: Solve for x
    x = 26,357,763,579.84/214,970.40
  6. Step 6: Final answer
    x = 122,611.13

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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.