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Finding the Fourth Proportional to 155,029.94, 213,904.77 and 87,961.94

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Solution

The fourth proportional to 155,029.94, 213,904.77 and 87,961.94 is: 121,366.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,029.94 : 213,904.77 = 87,961.94 : x
  2. Step 2: Convert to fraction form
    155,029.94/213,904.77 = 87,961.94/x
  3. Step 3: Cross multiply
    155,029.94x = 213,904.77 × 87,961.94
  4. Step 4: Simplify right side
    155,029.94x = 18,815,478,544.45
  5. Step 5: Solve for x
    x = 18,815,478,544.45/155,029.94
  6. Step 6: Final answer
    x = 121,366.74

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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.