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Finding the Fourth Proportional to 66,378.94, 99,586.86 and 28,942.28

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Solution

The fourth proportional to 66,378.94, 99,586.86 and 28,942.28 is: 43,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.94 : 99,586.86 = 28,942.28 : x
  2. Step 2: Convert to fraction form
    66,378.94/99,586.86 = 28,942.28/x
  3. Step 3: Cross multiply
    66,378.94x = 99,586.86 × 28,942.28
  4. Step 4: Simplify right side
    66,378.94x = 2,882,270,641.73
  5. Step 5: Solve for x
    x = 2,882,270,641.73/66,378.94
  6. Step 6: Final answer
    x = 43,421.47

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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.