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Finding the Fourth Proportional to 90,045.80, 134,874.30 and 74,493.80

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Solution

The fourth proportional to 90,045.80, 134,874.30 and 74,493.80 is: 111,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,045.80 : 134,874.30 = 74,493.80 : x
  2. Step 2: Convert to fraction form
    90,045.80/134,874.30 = 74,493.80/x
  3. Step 3: Cross multiply
    90,045.80x = 134,874.30 × 74,493.80
  4. Step 4: Simplify right side
    90,045.80x = 10,047,299,129.34
  5. Step 5: Solve for x
    x = 10,047,299,129.34/90,045.80
  6. Step 6: Final answer
    x = 111,579.88

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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.