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Finding the Fourth Proportional to 122,098.67, 168,510.08 and 74,379.95

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Solution

The fourth proportional to 122,098.67, 168,510.08 and 74,379.95 is: 102,652.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,098.67 : 168,510.08 = 74,379.95 : x
  2. Step 2: Convert to fraction form
    122,098.67/168,510.08 = 74,379.95/x
  3. Step 3: Cross multiply
    122,098.67x = 168,510.08 × 74,379.95
  4. Step 4: Simplify right side
    122,098.67x = 12,533,771,324.90
  5. Step 5: Solve for x
    x = 12,533,771,324.90/122,098.67
  6. Step 6: Final answer
    x = 102,652.81

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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.