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Finding the Fourth Proportional to 91,021, 136,554.54 and 25,357

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Solution

The fourth proportional to 91,021, 136,554.54 and 25,357 is: 38,041.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,021 : 136,554.54 = 25,357 : x
  2. Step 2: Convert to fraction form
    91,021/136,554.54 = 25,357/x
  3. Step 3: Cross multiply
    91,021x = 136,554.54 × 25,357
  4. Step 4: Simplify right side
    91,021x = 3,462,613,470.78
  5. Step 5: Solve for x
    x = 3,462,613,470.78/91,021
  6. Step 6: Final answer
    x = 38,041.92

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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.