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Finding the Fourth Proportional to 211,757.65, 292,142.21 and 121,064.89

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Solution

The fourth proportional to 211,757.65, 292,142.21 and 121,064.89 is: 167,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,757.65 : 292,142.21 = 121,064.89 : x
  2. Step 2: Convert to fraction form
    211,757.65/292,142.21 = 121,064.89/x
  3. Step 3: Cross multiply
    211,757.65x = 292,142.21 × 121,064.89
  4. Step 4: Simplify right side
    211,757.65x = 35,368,164,518.01
  5. Step 5: Solve for x
    x = 35,368,164,518.01/211,757.65
  6. Step 6: Final answer
    x = 167,021.90

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1.5x scale

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.