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Finding the Fourth Proportional to 211,358, 291,674.04 and 121,934

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Solution

The fourth proportional to 211,358, 291,674.04 and 121,934 is: 168,268.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,358 : 291,674.04 = 121,934 : x
  2. Step 2: Convert to fraction form
    211,358/291,674.04 = 121,934/x
  3. Step 3: Cross multiply
    211,358x = 291,674.04 × 121,934
  4. Step 4: Simplify right side
    211,358x = 35,564,982,393.36
  5. Step 5: Solve for x
    x = 35,564,982,393.36/211,358
  6. Step 6: Final answer
    x = 168,268.92

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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.