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Finding the Fourth Proportional to 65,889.28, 90,923.61 and 39,034.27

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Solution

The fourth proportional to 65,889.28, 90,923.61 and 39,034.27 is: 53,865.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,889.28 : 90,923.61 = 39,034.27 : x
  2. Step 2: Convert to fraction form
    65,889.28/90,923.61 = 39,034.27/x
  3. Step 3: Cross multiply
    65,889.28x = 90,923.61 × 39,034.27
  4. Step 4: Simplify right side
    65,889.28x = 3,549,136,742.11
  5. Step 5: Solve for x
    x = 3,549,136,742.11/65,889.28
  6. Step 6: Final answer
    x = 53,865.16

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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.