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Finding the Fourth Proportional to 65,525.01, 90,421.65 and 40,074.09

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Solution

The fourth proportional to 65,525.01, 90,421.65 and 40,074.09 is: 55,300.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,525.01 : 90,421.65 = 40,074.09 : x
  2. Step 2: Convert to fraction form
    65,525.01/90,421.65 = 40,074.09/x
  3. Step 3: Cross multiply
    65,525.01x = 90,421.65 × 40,074.09
  4. Step 4: Simplify right side
    65,525.01x = 3,623,565,340.05
  5. Step 5: Solve for x
    x = 3,623,565,340.05/65,525.01
  6. Step 6: Final answer
    x = 55,300.49

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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.