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Finding the Fourth Proportional to 122,098.17, 168,509.39 and 74,379.45

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Solution

The fourth proportional to 122,098.17, 168,509.39 and 74,379.45 is: 102,652.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,098.17 : 168,509.39 = 74,379.45 : x
  2. Step 2: Convert to fraction form
    122,098.17/168,509.39 = 74,379.45/x
  3. Step 3: Cross multiply
    122,098.17x = 168,509.39 × 74,379.45
  4. Step 4: Simplify right side
    122,098.17x = 12,533,635,748.04
  5. Step 5: Solve for x
    x = 12,533,635,748.04/122,098.17
  6. Step 6: Final answer
    x = 102,652.12

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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.