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Finding the Fourth Proportional to 211,678.64, 292,143.48 and 122,254.64

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Solution

The fourth proportional to 211,678.64, 292,143.48 and 122,254.64 is: 168,726.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,678.64 : 292,143.48 = 122,254.64 : x
  2. Step 2: Convert to fraction form
    211,678.64/292,143.48 = 122,254.64/x
  3. Step 3: Cross multiply
    211,678.64x = 292,143.48 × 122,254.64
  4. Step 4: Simplify right side
    211,678.64x = 35,715,895,975.75
  5. Step 5: Solve for x
    x = 35,715,895,975.75/211,678.64
  6. Step 6: Final answer
    x = 168,726.97

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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.