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Finding the Fourth Proportional to 66,418.32, 99,487.02 and 53,713.56

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Solution

The fourth proportional to 66,418.32, 99,487.02 and 53,713.56 is: 80,456.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.32 : 99,487.02 = 53,713.56 : x
  2. Step 2: Convert to fraction form
    66,418.32/99,487.02 = 53,713.56/x
  3. Step 3: Cross multiply
    66,418.32x = 99,487.02 × 53,713.56
  4. Step 4: Simplify right side
    66,418.32x = 5,343,802,017.99
  5. Step 5: Solve for x
    x = 5,343,802,017.99/66,418.32
  6. Step 6: Final answer
    x = 80,456.75

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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.