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Finding the Fourth Proportional to 217,415.90, 325,864.65 and 91,055.90

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Solution

The fourth proportional to 217,415.90, 325,864.65 and 91,055.90 is: 136,475.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,415.90 : 325,864.65 = 91,055.90 : x
  2. Step 2: Convert to fraction form
    217,415.90/325,864.65 = 91,055.90/x
  3. Step 3: Cross multiply
    217,415.90x = 325,864.65 × 91,055.90
  4. Step 4: Simplify right side
    217,415.90x = 29,671,898,983.94
  5. Step 5: Solve for x
    x = 29,671,898,983.94/217,415.90
  6. Step 6: Final answer
    x = 136,475.29

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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.