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Finding the Fourth Proportional to 92,128.63, 138,217.08 and 28,946.20

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Solution

The fourth proportional to 92,128.63, 138,217.08 and 28,946.20 is: 43,426.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,128.63 : 138,217.08 = 28,946.20 : x
  2. Step 2: Convert to fraction form
    92,128.63/138,217.08 = 28,946.20/x
  3. Step 3: Cross multiply
    92,128.63x = 138,217.08 × 28,946.20
  4. Step 4: Simplify right side
    92,128.63x = 4,000,859,241.10
  5. Step 5: Solve for x
    x = 4,000,859,241.10/92,128.63
  6. Step 6: Final answer
    x = 43,426.88

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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.