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Finding the Fourth Proportional to 90,670.80, 136,050.90 and 40,786.20

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Solution

The fourth proportional to 90,670.80, 136,050.90 and 40,786.20 is: 61,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,670.80 : 136,050.90 = 40,786.20 : x
  2. Step 2: Convert to fraction form
    90,670.80/136,050.90 = 40,786.20/x
  3. Step 3: Cross multiply
    90,670.80x = 136,050.90 × 40,786.20
  4. Step 4: Simplify right side
    90,670.80x = 5,548,999,217.58
  5. Step 5: Solve for x
    x = 5,548,999,217.58/90,670.80
  6. Step 6: Final answer
    x = 61,199.41

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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.