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Finding the Fourth Proportional to 155,218.54, 214,219.28 and 86,314.82

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Solution

The fourth proportional to 155,218.54, 214,219.28 and 86,314.82 is: 119,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,218.54 : 214,219.28 = 86,314.82 : x
  2. Step 2: Convert to fraction form
    155,218.54/214,219.28 = 86,314.82/x
  3. Step 3: Cross multiply
    155,218.54x = 214,219.28 × 86,314.82
  4. Step 4: Simplify right side
    155,218.54x = 18,490,299,181.75
  5. Step 5: Solve for x
    x = 18,490,299,181.75/155,218.54
  6. Step 6: Final answer
    x = 119,124.30

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1.5x scale

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.