Home / 90,012.20-135,002.10-56,672.60

Finding the Fourth Proportional to 90,012.20, 135,002.10 and 56,672.60

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Solution

The fourth proportional to 90,012.20, 135,002.10 and 56,672.60 is: 84,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,012.20 : 135,002.10 = 56,672.60 : x
  2. Step 2: Convert to fraction form
    90,012.20/135,002.10 = 56,672.60/x
  3. Step 3: Cross multiply
    90,012.20x = 135,002.10 × 56,672.60
  4. Step 4: Simplify right side
    90,012.20x = 7,650,920,012.46
  5. Step 5: Solve for x
    x = 7,650,920,012.46/90,012.20
  6. Step 6: Final answer
    x = 84,998.70

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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.