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Finding the Fourth Proportional to 103,483.20, 155,224.80 and 80,155.20

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Solution

The fourth proportional to 103,483.20, 155,224.80 and 80,155.20 is: 120,232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,483.20 : 155,224.80 = 80,155.20 : x
  2. Step 2: Convert to fraction form
    103,483.20/155,224.80 = 80,155.20/x
  3. Step 3: Cross multiply
    103,483.20x = 155,224.80 × 80,155.20
  4. Step 4: Simplify right side
    103,483.20x = 12,442,074,888.96
  5. Step 5: Solve for x
    x = 12,442,074,888.96/103,483.20
  6. Step 6: Final answer
    x = 120,232.80

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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.