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Finding the Fourth Proportional to 103,753.20, 155,284.20 and 91,311.60

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Solution

The fourth proportional to 103,753.20, 155,284.20 and 91,311.60 is: 136,663.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,753.20 : 155,284.20 = 91,311.60 : x
  2. Step 2: Convert to fraction form
    103,753.20/155,284.20 = 91,311.60/x
  3. Step 3: Cross multiply
    103,753.20x = 155,284.20 × 91,311.60
  4. Step 4: Simplify right side
    103,753.20x = 14,179,248,756.72
  5. Step 5: Solve for x
    x = 14,179,248,756.72/103,753.20
  6. Step 6: Final answer
    x = 136,663.24

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1.5x scale

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.