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Finding the Fourth Proportional to 125,021.39, 172,528.16 and 67,659.45

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Solution

The fourth proportional to 125,021.39, 172,528.16 and 67,659.45 is: 93,369.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,021.39 : 172,528.16 = 67,659.45 : x
  2. Step 2: Convert to fraction form
    125,021.39/172,528.16 = 67,659.45/x
  3. Step 3: Cross multiply
    125,021.39x = 172,528.16 × 67,659.45
  4. Step 4: Simplify right side
    125,021.39x = 11,673,160,076.81
  5. Step 5: Solve for x
    x = 11,673,160,076.81/125,021.39
  6. Step 6: Final answer
    x = 93,369.31

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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.