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Finding the Fourth Proportional to 99,221, 136,925.94 and 54,509.96

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Solution

The fourth proportional to 99,221, 136,925.94 and 54,509.96 is: 75,224.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,221 : 136,925.94 = 54,509.96 : x
  2. Step 2: Convert to fraction form
    99,221/136,925.94 = 54,509.96/x
  3. Step 3: Cross multiply
    99,221x = 136,925.94 × 54,509.96
  4. Step 4: Simplify right side
    99,221x = 7,463,827,512.36
  5. Step 5: Solve for x
    x = 7,463,827,512.36/99,221
  6. Step 6: Final answer
    x = 75,224.27

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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.