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Finding the Fourth Proportional to 155,603.22, 214,730.15 and 87,620.32

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Solution

The fourth proportional to 155,603.22, 214,730.15 and 87,620.32 is: 120,914.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,603.22 : 214,730.15 = 87,620.32 : x
  2. Step 2: Convert to fraction form
    155,603.22/214,730.15 = 87,620.32/x
  3. Step 3: Cross multiply
    155,603.22x = 214,730.15 × 87,620.32
  4. Step 4: Simplify right side
    155,603.22x = 18,814,724,456.65
  5. Step 5: Solve for x
    x = 18,814,724,456.65/155,603.22
  6. Step 6: Final answer
    x = 120,914.75

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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.