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Finding the Fourth Proportional to 67,128.32, 92,614.92 and 38,813.96

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Solution

The fourth proportional to 67,128.32, 92,614.92 and 38,813.96 is: 53,550.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,128.32 : 92,614.92 = 38,813.96 : x
  2. Step 2: Convert to fraction form
    67,128.32/92,614.92 = 38,813.96/x
  3. Step 3: Cross multiply
    67,128.32x = 92,614.92 × 38,813.96
  4. Step 4: Simplify right side
    67,128.32x = 3,594,751,800.28
  5. Step 5: Solve for x
    x = 3,594,751,800.28/67,128.32
  6. Step 6: Final answer
    x = 53,550.45

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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.