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Finding the Fourth Proportional to 103,525.70, 155,288.55 and 91,059.80

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Solution

The fourth proportional to 103,525.70, 155,288.55 and 91,059.80 is: 136,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,525.70 : 155,288.55 = 91,059.80 : x
  2. Step 2: Convert to fraction form
    103,525.70/155,288.55 = 91,059.80/x
  3. Step 3: Cross multiply
    103,525.70x = 155,288.55 × 91,059.80
  4. Step 4: Simplify right side
    103,525.70x = 14,140,544,305.29
  5. Step 5: Solve for x
    x = 14,140,544,305.29/103,525.70
  6. Step 6: Final answer
    x = 136,589.70

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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.