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Finding the Fourth Proportional to 155,370.76, 214,418.04 and 87,390.90

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Solution

The fourth proportional to 155,370.76, 214,418.04 and 87,390.90 is: 120,603.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,370.76 : 214,418.04 = 87,390.90 : x
  2. Step 2: Convert to fraction form
    155,370.76/214,418.04 = 87,390.90/x
  3. Step 3: Cross multiply
    155,370.76x = 214,418.04 × 87,390.90
  4. Step 4: Simplify right side
    155,370.76x = 18,738,185,164.12
  5. Step 5: Solve for x
    x = 18,738,185,164.12/155,370.76
  6. Step 6: Final answer
    x = 120,603.04

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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.