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Finding the Fourth Proportional to 66,190.40, 99,362.40 and 39,924.80

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Solution

The fourth proportional to 66,190.40, 99,362.40 and 39,924.80 is: 59,933.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,190.40 : 99,362.40 = 39,924.80 : x
  2. Step 2: Convert to fraction form
    66,190.40/99,362.40 = 39,924.80/x
  3. Step 3: Cross multiply
    66,190.40x = 99,362.40 × 39,924.80
  4. Step 4: Simplify right side
    66,190.40x = 3,967,023,947.52
  5. Step 5: Solve for x
    x = 3,967,023,947.52/66,190.40
  6. Step 6: Final answer
    x = 59,933.52

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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.