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Finding the Fourth Proportional to 321,077.54, 481,638.80 and 128,951.98

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Solution

The fourth proportional to 321,077.54, 481,638.80 and 128,951.98 is: 193,437.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,077.54 : 481,638.80 = 128,951.98 : x
  2. Step 2: Convert to fraction form
    321,077.54/481,638.80 = 128,951.98/x
  3. Step 3: Cross multiply
    321,077.54x = 481,638.80 × 128,951.98
  4. Step 4: Simplify right side
    321,077.54x = 62,108,276,904.82
  5. Step 5: Solve for x
    x = 62,108,276,904.82/321,077.54
  6. Step 6: Final answer
    x = 193,437.00

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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.