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Finding the Fourth Proportional to 65,900.53, 90,939.13 and 39,045.52

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Solution

The fourth proportional to 65,900.53, 90,939.13 and 39,045.52 is: 53,880.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,900.53 : 90,939.13 = 39,045.52 : x
  2. Step 2: Convert to fraction form
    65,900.53/90,939.13 = 39,045.52/x
  3. Step 3: Cross multiply
    65,900.53x = 90,939.13 × 39,045.52
  4. Step 4: Simplify right side
    65,900.53x = 3,550,765,619.20
  5. Step 5: Solve for x
    x = 3,550,765,619.20/65,900.53
  6. Step 6: Final answer
    x = 53,880.68

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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.