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Finding the Fourth Proportional to 92,426.80, 138,640.20 and 30,103.60

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Solution

The fourth proportional to 92,426.80, 138,640.20 and 30,103.60 is: 45,155.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,426.80 : 138,640.20 = 30,103.60 : x
  2. Step 2: Convert to fraction form
    92,426.80/138,640.20 = 30,103.60/x
  3. Step 3: Cross multiply
    92,426.80x = 138,640.20 × 30,103.60
  4. Step 4: Simplify right side
    92,426.80x = 4,173,569,124.72
  5. Step 5: Solve for x
    x = 4,173,569,124.72/92,426.80
  6. Step 6: Final answer
    x = 45,155.40

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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.