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Finding the Fourth Proportional to 122,709.84, 169,335.21 and 68,997.93

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Solution

The fourth proportional to 122,709.84, 169,335.21 and 68,997.93 is: 95,214.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,709.84 : 169,335.21 = 68,997.93 : x
  2. Step 2: Convert to fraction form
    122,709.84/169,335.21 = 68,997.93/x
  3. Step 3: Cross multiply
    122,709.84x = 169,335.21 × 68,997.93
  4. Step 4: Simplify right side
    122,709.84x = 11,683,778,966.12
  5. Step 5: Solve for x
    x = 11,683,778,966.12/122,709.84
  6. Step 6: Final answer
    x = 95,214.69

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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.