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Finding the Fourth Proportional to 200,979.90, 301,032.45 and 121,956.30

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Solution

The fourth proportional to 200,979.90, 301,032.45 and 121,956.30 is: 182,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,979.90 : 301,032.45 = 121,956.30 : x
  2. Step 2: Convert to fraction form
    200,979.90/301,032.45 = 121,956.30/x
  3. Step 3: Cross multiply
    200,979.90x = 301,032.45 × 121,956.30
  4. Step 4: Simplify right side
    200,979.90x = 36,712,803,781.94
  5. Step 5: Solve for x
    x = 36,712,803,781.94/200,979.90
  6. Step 6: Final answer
    x = 182,669.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.