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Finding the Fourth Proportional to 99,808.60, 149,712.90 and 89,967.10

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Solution

The fourth proportional to 99,808.60, 149,712.90 and 89,967.10 is: 134,950.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,808.60 : 149,712.90 = 89,967.10 : x
  2. Step 2: Convert to fraction form
    99,808.60/149,712.90 = 89,967.10/x
  3. Step 3: Cross multiply
    99,808.60x = 149,712.90 × 89,967.10
  4. Step 4: Simplify right side
    99,808.60x = 13,469,235,445.59
  5. Step 5: Solve for x
    x = 13,469,235,445.59/99,808.60
  6. Step 6: Final answer
    x = 134,950.65

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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.