Home / 90,021.20-135,116.60-45,679.77

Finding the Fourth Proportional to 90,021.20, 135,116.60 and 45,679.77

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Solution

The fourth proportional to 90,021.20, 135,116.60 and 45,679.77 is: 68,562.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,021.20 : 135,116.60 = 45,679.77 : x
  2. Step 2: Convert to fraction form
    90,021.20/135,116.60 = 45,679.77/x
  3. Step 3: Cross multiply
    90,021.20x = 135,116.60 × 45,679.77
  4. Step 4: Simplify right side
    90,021.20x = 6,172,095,211.18
  5. Step 5: Solve for x
    x = 6,172,095,211.18/90,021.20
  6. Step 6: Final answer
    x = 68,562.69

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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.