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Finding the Fourth Proportional to 65,392.85, 98,090.18 and 18,645.72

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Solution

The fourth proportional to 65,392.85, 98,090.18 and 18,645.72 is: 27,968.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,392.85 : 98,090.18 = 18,645.72 : x
  2. Step 2: Convert to fraction form
    65,392.85/98,090.18 = 18,645.72/x
  3. Step 3: Cross multiply
    65,392.85x = 98,090.18 × 18,645.72
  4. Step 4: Simplify right side
    65,392.85x = 1,828,962,031.03
  5. Step 5: Solve for x
    x = 1,828,962,031.03/65,392.85
  6. Step 6: Final answer
    x = 27,968.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.