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Finding the Fourth Proportional to 155,825.87, 215,026.74 and 87,859.55

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Solution

The fourth proportional to 155,825.87, 215,026.74 and 87,859.55 is: 121,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,825.87 : 215,026.74 = 87,859.55 : x
  2. Step 2: Convert to fraction form
    155,825.87/215,026.74 = 87,859.55/x
  3. Step 3: Cross multiply
    155,825.87x = 215,026.74 × 87,859.55
  4. Step 4: Simplify right side
    155,825.87x = 18,892,153,151.93
  5. Step 5: Solve for x
    x = 18,892,153,151.93/155,825.87
  6. Step 6: Final answer
    x = 121,238.88

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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.