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Finding the Fourth Proportional to 65,403.63, 90,274.28 and 38,564.03

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Solution

The fourth proportional to 65,403.63, 90,274.28 and 38,564.03 is: 53,228.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,403.63 : 90,274.28 = 38,564.03 : x
  2. Step 2: Convert to fraction form
    65,403.63/90,274.28 = 38,564.03/x
  3. Step 3: Cross multiply
    65,403.63x = 90,274.28 × 38,564.03
  4. Step 4: Simplify right side
    65,403.63x = 3,481,339,397.96
  5. Step 5: Solve for x
    x = 3,481,339,397.96/65,403.63
  6. Step 6: Final answer
    x = 53,228.53

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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.