Home / 102,321.63-141,208.11-56,999.61

Finding the Fourth Proportional to 102,321.63, 141,208.11 and 56,999.61

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Solution

The fourth proportional to 102,321.63, 141,208.11 and 56,999.61 is: 78,661.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,321.63 : 141,208.11 = 56,999.61 : x
  2. Step 2: Convert to fraction form
    102,321.63/141,208.11 = 56,999.61/x
  3. Step 3: Cross multiply
    102,321.63x = 141,208.11 × 56,999.61
  4. Step 4: Simplify right side
    102,321.63x = 8,048,806,913.84
  5. Step 5: Solve for x
    x = 8,048,806,913.84/102,321.63
  6. Step 6: Final answer
    x = 78,661.83

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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.