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Finding the Fourth Proportional to 66,689.52, 92,050.20 and 38,406.48

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Solution

The fourth proportional to 66,689.52, 92,050.20 and 38,406.48 is: 53,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,689.52 : 92,050.20 = 38,406.48 : x
  2. Step 2: Convert to fraction form
    66,689.52/92,050.20 = 38,406.48/x
  3. Step 3: Cross multiply
    66,689.52x = 92,050.20 × 38,406.48
  4. Step 4: Simplify right side
    66,689.52x = 3,535,324,165.30
  5. Step 5: Solve for x
    x = 3,535,324,165.30/66,689.52
  6. Step 6: Final answer
    x = 53,011.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.