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Finding the Fourth Proportional to 103,548.88, 155,125.43 and 86,789.17

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Solution

The fourth proportional to 103,548.88, 155,125.43 and 86,789.17 is: 130,017.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,548.88 : 155,125.43 = 86,789.17 : x
  2. Step 2: Convert to fraction form
    103,548.88/155,125.43 = 86,789.17/x
  3. Step 3: Cross multiply
    103,548.88x = 155,125.43 × 86,789.17
  4. Step 4: Simplify right side
    103,548.88x = 13,463,206,106.02
  5. Step 5: Solve for x
    x = 13,463,206,106.02/103,548.88
  6. Step 6: Final answer
    x = 130,017.89

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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.