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Finding the Fourth Proportional to 91,266.78, 136,905.02 and 28,130.27

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Solution

The fourth proportional to 91,266.78, 136,905.02 and 28,130.27 is: 42,196.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,266.78 : 136,905.02 = 28,130.27 : x
  2. Step 2: Convert to fraction form
    91,266.78/136,905.02 = 28,130.27/x
  3. Step 3: Cross multiply
    91,266.78x = 136,905.02 × 28,130.27
  4. Step 4: Simplify right side
    91,266.78x = 3,851,174,351.78
  5. Step 5: Solve for x
    x = 3,851,174,351.78/91,266.78
  6. Step 6: Final answer
    x = 42,196.89

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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.