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Finding the Fourth Proportional to 122,139.88, 182,898.78 and 80,460.52

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Solution

The fourth proportional to 122,139.88, 182,898.78 and 80,460.52 is: 120,485.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,139.88 : 182,898.78 = 80,460.52 : x
  2. Step 2: Convert to fraction form
    122,139.88/182,898.78 = 80,460.52/x
  3. Step 3: Cross multiply
    122,139.88x = 182,898.78 × 80,460.52
  4. Step 4: Simplify right side
    122,139.88x = 14,716,130,946.17
  5. Step 5: Solve for x
    x = 14,716,130,946.17/122,139.88
  6. Step 6: Final answer
    x = 120,485.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.