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Finding the Fourth Proportional to 65,590, 98,401.61 and 18,842.88

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Solution

The fourth proportional to 65,590, 98,401.61 and 18,842.88 is: 28,269.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,590 : 98,401.61 = 18,842.88 : x
  2. Step 2: Convert to fraction form
    65,590/98,401.61 = 18,842.88/x
  3. Step 3: Cross multiply
    65,590x = 98,401.61 × 18,842.88
  4. Step 4: Simplify right side
    65,590x = 1,854,169,729.04
  5. Step 5: Solve for x
    x = 1,854,169,729.04/65,590
  6. Step 6: Final answer
    x = 28,269.09

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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.