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Finding the Fourth Proportional to 211,685.76, 292,105.08 and 126,800.64

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Solution

The fourth proportional to 211,685.76, 292,105.08 and 126,800.64 is: 174,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,685.76 : 292,105.08 = 126,800.64 : x
  2. Step 2: Convert to fraction form
    211,685.76/292,105.08 = 126,800.64/x
  3. Step 3: Cross multiply
    211,685.76x = 292,105.08 × 126,800.64
  4. Step 4: Simplify right side
    211,685.76x = 37,039,111,091.25
  5. Step 5: Solve for x
    x = 37,039,111,091.25/211,685.76
  6. Step 6: Final answer
    x = 174,972.14

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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.