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Finding the Fourth Proportional to 105,231.60, 157,847.40 and 31,359.60

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Solution

The fourth proportional to 105,231.60, 157,847.40 and 31,359.60 is: 47,039.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,231.60 : 157,847.40 = 31,359.60 : x
  2. Step 2: Convert to fraction form
    105,231.60/157,847.40 = 31,359.60/x
  3. Step 3: Cross multiply
    105,231.60x = 157,847.40 × 31,359.60
  4. Step 4: Simplify right side
    105,231.60x = 4,950,031,325.04
  5. Step 5: Solve for x
    x = 4,950,031,325.04/105,231.60
  6. Step 6: Final answer
    x = 47,039.40

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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.