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Finding the Fourth Proportional to 122,492.86, 169,035.87 and 74,825.98

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Solution

The fourth proportional to 122,492.86, 169,035.87 and 74,825.98 is: 103,257.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,492.86 : 169,035.87 = 74,825.98 : x
  2. Step 2: Convert to fraction form
    122,492.86/169,035.87 = 74,825.98/x
  3. Step 3: Cross multiply
    122,492.86x = 169,035.87 × 74,825.98
  4. Step 4: Simplify right side
    122,492.86x = 12,648,274,627.90
  5. Step 5: Solve for x
    x = 12,648,274,627.90/122,492.86
  6. Step 6: Final answer
    x = 103,257.24

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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.