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Finding the Fourth Proportional to 155,311.66, 214,327.72 and 87,328.70

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Solution

The fourth proportional to 155,311.66, 214,327.72 and 87,328.70 is: 120,512.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,311.66 : 214,327.72 = 87,328.70 : x
  2. Step 2: Convert to fraction form
    155,311.66/214,327.72 = 87,328.70/x
  3. Step 3: Cross multiply
    155,311.66x = 214,327.72 × 87,328.70
  4. Step 4: Simplify right side
    155,311.66x = 18,716,961,002.82
  5. Step 5: Solve for x
    x = 18,716,961,002.82/155,311.66
  6. Step 6: Final answer
    x = 120,512.27

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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.