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Finding the Fourth Proportional to 65,715.30, 90,687.02 and 37,420.99

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Solution

The fourth proportional to 65,715.30, 90,687.02 and 37,420.99 is: 51,640.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,715.30 : 90,687.02 = 37,420.99 : x
  2. Step 2: Convert to fraction form
    65,715.30/90,687.02 = 37,420.99/x
  3. Step 3: Cross multiply
    65,715.30x = 90,687.02 × 37,420.99
  4. Step 4: Simplify right side
    65,715.30x = 3,393,597,654.73
  5. Step 5: Solve for x
    x = 3,393,597,654.73/65,715.30
  6. Step 6: Final answer
    x = 51,640.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.