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Finding the Fourth Proportional to 155,456, 214,529.28 and 88,388

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Solution

The fourth proportional to 155,456, 214,529.28 and 88,388 is: 121,975.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,456 : 214,529.28 = 88,388 : x
  2. Step 2: Convert to fraction form
    155,456/214,529.28 = 88,388/x
  3. Step 3: Cross multiply
    155,456x = 214,529.28 × 88,388
  4. Step 4: Simplify right side
    155,456x = 18,961,814,000.64
  5. Step 5: Solve for x
    x = 18,961,814,000.64/155,456
  6. Step 6: Final answer
    x = 121,975.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.