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Finding the Fourth Proportional to 65,787, 90,801.04 and 38,945.22

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Solution

The fourth proportional to 65,787, 90,801.04 and 38,945.22 is: 53,753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,787 : 90,801.04 = 38,945.22 : x
  2. Step 2: Convert to fraction form
    65,787/90,801.04 = 38,945.22/x
  3. Step 3: Cross multiply
    65,787x = 90,801.04 × 38,945.22
  4. Step 4: Simplify right side
    65,787x = 3,536,266,479.03
  5. Step 5: Solve for x
    x = 3,536,266,479.03/65,787
  6. Step 6: Final answer
    x = 53,753.27

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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.