Home / 90,861.90-136,438.65-61,410.30

Finding the Fourth Proportional to 90,861.90, 136,438.65 and 61,410.30

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Solution

The fourth proportional to 90,861.90, 136,438.65 and 61,410.30 is: 92,213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,861.90 : 136,438.65 = 61,410.30 : x
  2. Step 2: Convert to fraction form
    90,861.90/136,438.65 = 61,410.30/x
  3. Step 3: Cross multiply
    90,861.90x = 136,438.65 × 61,410.30
  4. Step 4: Simplify right side
    90,861.90x = 8,378,738,428.10
  5. Step 5: Solve for x
    x = 8,378,738,428.10/90,861.90
  6. Step 6: Final answer
    x = 92,213.99

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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.