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Finding the Fourth Proportional to 157,031.01, 216,924.75 and 121,676.94

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Solution

The fourth proportional to 157,031.01, 216,924.75 and 121,676.94 is: 168,086.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,031.01 : 216,924.75 = 121,676.94 : x
  2. Step 2: Convert to fraction form
    157,031.01/216,924.75 = 121,676.94/x
  3. Step 3: Cross multiply
    157,031.01x = 216,924.75 × 121,676.94
  4. Step 4: Simplify right side
    157,031.01x = 26,394,739,790.27
  5. Step 5: Solve for x
    x = 26,394,739,790.27/157,031.01
  6. Step 6: Final answer
    x = 168,086.16

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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.