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Finding the Fourth Proportional to 65,411.88, 90,302.02 and 38,563.08

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Solution

The fourth proportional to 65,411.88, 90,302.02 and 38,563.08 is: 53,236.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,411.88 : 90,302.02 = 38,563.08 : x
  2. Step 2: Convert to fraction form
    65,411.88/90,302.02 = 38,563.08/x
  3. Step 3: Cross multiply
    65,411.88x = 90,302.02 × 38,563.08
  4. Step 4: Simplify right side
    65,411.88x = 3,482,324,021.42
  5. Step 5: Solve for x
    x = 3,482,324,021.42/65,411.88
  6. Step 6: Final answer
    x = 53,236.87

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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.