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Finding the Fourth Proportional to 99,485.01, 149,070.78 and 59,405.81

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Solution

The fourth proportional to 99,485.01, 149,070.78 and 59,405.81 is: 89,015.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,485.01 : 149,070.78 = 59,405.81 : x
  2. Step 2: Convert to fraction form
    99,485.01/149,070.78 = 59,405.81/x
  3. Step 3: Cross multiply
    99,485.01x = 149,070.78 × 59,405.81
  4. Step 4: Simplify right side
    99,485.01x = 8,855,669,687.88
  5. Step 5: Solve for x
    x = 8,855,669,687.88/99,485.01
  6. Step 6: Final answer
    x = 89,015.12

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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.