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Finding the Fourth Proportional to 121,035.60, 181,529.10 and 57,855.60

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Solution

The fourth proportional to 121,035.60, 181,529.10 and 57,855.60 is: 86,771.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,035.60 : 181,529.10 = 57,855.60 : x
  2. Step 2: Convert to fraction form
    121,035.60/181,529.10 = 57,855.60/x
  3. Step 3: Cross multiply
    121,035.60x = 181,529.10 × 57,855.60
  4. Step 4: Simplify right side
    121,035.60x = 10,502,474,997.96
  5. Step 5: Solve for x
    x = 10,502,474,997.96/121,035.60
  6. Step 6: Final answer
    x = 86,771.78

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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.