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Finding the Fourth Proportional to 190,051.20, 285,009.60 and 65,363.20

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Solution

The fourth proportional to 190,051.20, 285,009.60 and 65,363.20 is: 98,021.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,051.20 : 285,009.60 = 65,363.20 : x
  2. Step 2: Convert to fraction form
    190,051.20/285,009.60 = 65,363.20/x
  3. Step 3: Cross multiply
    190,051.20x = 285,009.60 × 65,363.20
  4. Step 4: Simplify right side
    190,051.20x = 18,629,139,486.72
  5. Step 5: Solve for x
    x = 18,629,139,486.72/190,051.20
  6. Step 6: Final answer
    x = 98,021.69

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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.