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Finding the Fourth Proportional to 122,808.72, 169,420.88 and 75,053.20

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Solution

The fourth proportional to 122,808.72, 169,420.88 and 75,053.20 is: 103,539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,808.72 : 169,420.88 = 75,053.20 : x
  2. Step 2: Convert to fraction form
    122,808.72/169,420.88 = 75,053.20/x
  3. Step 3: Cross multiply
    122,808.72x = 169,420.88 × 75,053.20
  4. Step 4: Simplify right side
    122,808.72x = 12,715,579,190.82
  5. Step 5: Solve for x
    x = 12,715,579,190.82/122,808.72
  6. Step 6: Final answer
    x = 103,539.71

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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.