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Finding the Fourth Proportional to 99,466.80, 149,027.40 and 81,841.20

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Solution

The fourth proportional to 99,466.80, 149,027.40 and 81,841.20 is: 122,619.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,466.80 : 149,027.40 = 81,841.20 : x
  2. Step 2: Convert to fraction form
    99,466.80/149,027.40 = 81,841.20/x
  3. Step 3: Cross multiply
    99,466.80x = 149,027.40 × 81,841.20
  4. Step 4: Simplify right side
    99,466.80x = 12,196,581,248.88
  5. Step 5: Solve for x
    x = 12,196,581,248.88/99,466.80
  6. Step 6: Final answer
    x = 122,619.62

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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.