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Finding the Fourth Proportional to 103,456.74, 155,173.44 and 28,587.57

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Solution

The fourth proportional to 103,456.74, 155,173.44 and 28,587.57 is: 42,878.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,456.74 : 155,173.44 = 28,587.57 : x
  2. Step 2: Convert to fraction form
    103,456.74/155,173.44 = 28,587.57/x
  3. Step 3: Cross multiply
    103,456.74x = 155,173.44 × 28,587.57
  4. Step 4: Simplify right side
    103,456.74x = 4,436,031,578.14
  5. Step 5: Solve for x
    x = 4,436,031,578.14/103,456.74
  6. Step 6: Final answer
    x = 42,878.13

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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.