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Finding the Fourth Proportional to 155,603.72, 214,730.84 and 87,620.82

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Solution

The fourth proportional to 155,603.72, 214,730.84 and 87,620.82 is: 120,915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,603.72 : 214,730.84 = 87,620.82 : x
  2. Step 2: Convert to fraction form
    155,603.72/214,730.84 = 87,620.82/x
  3. Step 3: Cross multiply
    155,603.72x = 214,730.84 × 87,620.82
  4. Step 4: Simplify right side
    155,603.72x = 18,814,891,841.98
  5. Step 5: Solve for x
    x = 18,814,891,841.98/155,603.72
  6. Step 6: Final answer
    x = 120,915.44

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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.