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Finding the Fourth Proportional to 217,703.52, 326,305.53 and 91,320.39

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Solution

The fourth proportional to 217,703.52, 326,305.53 and 91,320.39 is: 136,875.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,703.52 : 326,305.53 = 91,320.39 : x
  2. Step 2: Convert to fraction form
    217,703.52/326,305.53 = 91,320.39/x
  3. Step 3: Cross multiply
    217,703.52x = 326,305.53 × 91,320.39
  4. Step 4: Simplify right side
    217,703.52x = 29,798,348,258.76
  5. Step 5: Solve for x
    x = 29,798,348,258.76/217,703.52
  6. Step 6: Final answer
    x = 136,875.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.