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Finding the Fourth Proportional to 99,564.30, 148,914.45 and 89,109.90

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Solution

The fourth proportional to 99,564.30, 148,914.45 and 89,109.90 is: 133,278.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,564.30 : 148,914.45 = 89,109.90 : x
  2. Step 2: Convert to fraction form
    99,564.30/148,914.45 = 89,109.90/x
  3. Step 3: Cross multiply
    99,564.30x = 148,914.45 × 89,109.90
  4. Step 4: Simplify right side
    99,564.30x = 13,269,751,748.06
  5. Step 5: Solve for x
    x = 13,269,751,748.06/99,564.30
  6. Step 6: Final answer
    x = 133,278.21

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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.