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Finding the Fourth Proportional to 124,713.94, 172,109.01 and 68,128.96

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Solution

The fourth proportional to 124,713.94, 172,109.01 and 68,128.96 is: 94,020.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,713.94 : 172,109.01 = 68,128.96 : x
  2. Step 2: Convert to fraction form
    124,713.94/172,109.01 = 68,128.96/x
  3. Step 3: Cross multiply
    124,713.94x = 172,109.01 × 68,128.96
  4. Step 4: Simplify right side
    124,713.94x = 11,725,607,683.14
  5. Step 5: Solve for x
    x = 11,725,607,683.14/124,713.94
  6. Step 6: Final answer
    x = 94,020.03

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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.