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Finding the Fourth Proportional to 90,865.90, 136,444.65 and 61,414.30

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Solution

The fourth proportional to 90,865.90, 136,444.65 and 61,414.30 is: 92,219.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,865.90 : 136,444.65 = 61,414.30 : x
  2. Step 2: Convert to fraction form
    90,865.90/136,444.65 = 61,414.30/x
  3. Step 3: Cross multiply
    90,865.90x = 136,444.65 × 61,414.30
  4. Step 4: Simplify right side
    90,865.90x = 8,379,652,668.50
  5. Step 5: Solve for x
    x = 8,379,652,668.50/90,865.90
  6. Step 6: Final answer
    x = 92,219.99

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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.