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Finding the Fourth Proportional to 103,878.05, 155,658.51 and 61,675.02

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Solution

The fourth proportional to 103,878.05, 155,658.51 and 61,675.02 is: 92,418.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,878.05 : 155,658.51 = 61,675.02 : x
  2. Step 2: Convert to fraction form
    103,878.05/155,658.51 = 61,675.02/x
  3. Step 3: Cross multiply
    103,878.05x = 155,658.51 × 61,675.02
  4. Step 4: Simplify right side
    103,878.05x = 9,600,241,717.42
  5. Step 5: Solve for x
    x = 9,600,241,717.42/103,878.05
  6. Step 6: Final answer
    x = 92,418.39

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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.