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Finding the Fourth Proportional to 103,325.10, 154,987.65 and 28,456.80

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Solution

The fourth proportional to 103,325.10, 154,987.65 and 28,456.80 is: 42,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,325.10 : 154,987.65 = 28,456.80 : x
  2. Step 2: Convert to fraction form
    103,325.10/154,987.65 = 28,456.80/x
  3. Step 3: Cross multiply
    103,325.10x = 154,987.65 × 28,456.80
  4. Step 4: Simplify right side
    103,325.10x = 4,410,452,558.52
  5. Step 5: Solve for x
    x = 4,410,452,558.52/103,325.10
  6. Step 6: Final answer
    x = 42,685.20

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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.