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Finding the Fourth Proportional to 91,011, 136,516.50 and 25,347

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Solution

The fourth proportional to 91,011, 136,516.50 and 25,347 is: 38,020.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,011 : 136,516.50 = 25,347 : x
  2. Step 2: Convert to fraction form
    91,011/136,516.50 = 25,347/x
  3. Step 3: Cross multiply
    91,011x = 136,516.50 × 25,347
  4. Step 4: Simplify right side
    91,011x = 3,460,283,725.50
  5. Step 5: Solve for x
    x = 3,460,283,725.50/91,011
  6. Step 6: Final answer
    x = 38,020.50

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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.