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Finding the Fourth Proportional to 217,273.77, 299,836.84 and 121,780.47

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Solution

The fourth proportional to 217,273.77, 299,836.84 and 121,780.47 is: 168,056.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,273.77 : 299,836.84 = 121,780.47 : x
  2. Step 2: Convert to fraction form
    217,273.77/299,836.84 = 121,780.47/x
  3. Step 3: Cross multiply
    217,273.77x = 299,836.84 × 121,780.47
  4. Step 4: Simplify right side
    217,273.77x = 36,514,271,298.51
  5. Step 5: Solve for x
    x = 36,514,271,298.51/217,273.77
  6. Step 6: Final answer
    x = 168,056.51

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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.