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Finding the Fourth Proportional to 215,736.16, 323,574 and 91,048

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Solution

The fourth proportional to 215,736.16, 323,574 and 91,048 is: 136,559.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,736.16 : 323,574 = 91,048 : x
  2. Step 2: Convert to fraction form
    215,736.16/323,574 = 91,048/x
  3. Step 3: Cross multiply
    215,736.16x = 323,574 × 91,048
  4. Step 4: Simplify right side
    215,736.16x = 29,460,765,552
  5. Step 5: Solve for x
    x = 29,460,765,552/215,736.16
  6. Step 6: Final answer
    x = 136,559.24

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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.