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Finding the Fourth Proportional to 114,991.60, 172,424.80 and 40,091.60

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Solution

The fourth proportional to 114,991.60, 172,424.80 and 40,091.60 is: 60,115.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,991.60 : 172,424.80 = 40,091.60 : x
  2. Step 2: Convert to fraction form
    114,991.60/172,424.80 = 40,091.60/x
  3. Step 3: Cross multiply
    114,991.60x = 172,424.80 × 40,091.60
  4. Step 4: Simplify right side
    114,991.60x = 6,912,785,911.22
  5. Step 5: Solve for x
    x = 6,912,785,911.22/114,991.60
  6. Step 6: Final answer
    x = 60,115.57

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1.5x scale

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.