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Finding the Fourth Proportional to 65,921.45, 90,980.42 and 37,247.04

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Solution

The fourth proportional to 65,921.45, 90,980.42 and 37,247.04 is: 51,405.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,921.45 : 90,980.42 = 37,247.04 : x
  2. Step 2: Convert to fraction form
    65,921.45/90,980.42 = 37,247.04/x
  3. Step 3: Cross multiply
    65,921.45x = 90,980.42 × 37,247.04
  4. Step 4: Simplify right side
    65,921.45x = 3,388,751,156.72
  5. Step 5: Solve for x
    x = 3,388,751,156.72/65,921.45
  6. Step 6: Final answer
    x = 51,405.90

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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.