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Finding the Fourth Proportional to 211,978.01, 292,523.55 and 121,330.96

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Solution

The fourth proportional to 211,978.01, 292,523.55 and 121,330.96 is: 167,433.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,978.01 : 292,523.55 = 121,330.96 : x
  2. Step 2: Convert to fraction form
    211,978.01/292,523.55 = 121,330.96/x
  3. Step 3: Cross multiply
    211,978.01x = 292,523.55 × 121,330.96
  4. Step 4: Simplify right side
    211,978.01x = 35,492,164,285.74
  5. Step 5: Solve for x
    x = 35,492,164,285.74/211,978.01
  6. Step 6: Final answer
    x = 167,433.23

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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.