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Finding the Fourth Proportional to 65,712.30, 98,455.05 and 30,579.90

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Solution

The fourth proportional to 65,712.30, 98,455.05 and 30,579.90 is: 45,817.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.30 : 98,455.05 = 30,579.90 : x
  2. Step 2: Convert to fraction form
    65,712.30/98,455.05 = 30,579.90/x
  3. Step 3: Cross multiply
    65,712.30x = 98,455.05 × 30,579.90
  4. Step 4: Simplify right side
    65,712.30x = 3,010,745,583.50
  5. Step 5: Solve for x
    x = 3,010,745,583.50/65,712.30
  6. Step 6: Final answer
    x = 45,817.08

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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.