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Finding the Fourth Proportional to 99,346.10, 148,691.10 and 69,821.60

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Solution

The fourth proportional to 99,346.10, 148,691.10 and 69,821.60 is: 104,501.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,346.10 : 148,691.10 = 69,821.60 : x
  2. Step 2: Convert to fraction form
    99,346.10/148,691.10 = 69,821.60/x
  3. Step 3: Cross multiply
    99,346.10x = 148,691.10 × 69,821.60
  4. Step 4: Simplify right side
    99,346.10x = 10,381,850,507.76
  5. Step 5: Solve for x
    x = 10,381,850,507.76/99,346.10
  6. Step 6: Final answer
    x = 104,501.84

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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.