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Finding the Fourth Proportional to 155,573.82, 214,689.42 and 87,590.64

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Solution

The fourth proportional to 155,573.82, 214,689.42 and 87,590.64 is: 120,873.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,573.82 : 214,689.42 = 87,590.64 : x
  2. Step 2: Convert to fraction form
    155,573.82/214,689.42 = 87,590.64/x
  3. Step 3: Cross multiply
    155,573.82x = 214,689.42 × 87,590.64
  4. Step 4: Simplify right side
    155,573.82x = 18,804,783,699.03
  5. Step 5: Solve for x
    x = 18,804,783,699.03/155,573.82
  6. Step 6: Final answer
    x = 120,873.70

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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.