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Finding the Fourth Proportional to 122,021.52, 183,386.52 and 80,730.96

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Solution

The fourth proportional to 122,021.52, 183,386.52 and 80,730.96 is: 121,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,021.52 : 183,386.52 = 80,730.96 : x
  2. Step 2: Convert to fraction form
    122,021.52/183,386.52 = 80,730.96/x
  3. Step 3: Cross multiply
    122,021.52x = 183,386.52 × 80,730.96
  4. Step 4: Simplify right side
    122,021.52x = 14,804,969,810.66
  5. Step 5: Solve for x
    x = 14,804,969,810.66/122,021.52
  6. Step 6: Final answer
    x = 121,330.81

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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.