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Finding the Fourth Proportional to 103,885.88, 155,637.45 and 92,678.41

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Solution

The fourth proportional to 103,885.88, 155,637.45 and 92,678.41 is: 138,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,885.88 : 155,637.45 = 92,678.41 : x
  2. Step 2: Convert to fraction form
    103,885.88/155,637.45 = 92,678.41/x
  3. Step 3: Cross multiply
    103,885.88x = 155,637.45 × 92,678.41
  4. Step 4: Simplify right side
    103,885.88x = 14,424,231,597.00
  5. Step 5: Solve for x
    x = 14,424,231,597.00/103,885.88
  6. Step 6: Final answer
    x = 138,846.90

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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.