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Finding the Fourth Proportional to 92,489.60, 138,681.41 and 28,431.06

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Solution

The fourth proportional to 92,489.60, 138,681.41 and 28,431.06 is: 42,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,489.60 : 138,681.41 = 28,431.06 : x
  2. Step 2: Convert to fraction form
    92,489.60/138,681.41 = 28,431.06/x
  3. Step 3: Cross multiply
    92,489.60x = 138,681.41 × 28,431.06
  4. Step 4: Simplify right side
    92,489.60x = 3,942,859,346.44
  5. Step 5: Solve for x
    x = 3,942,859,346.44/92,489.60
  6. Step 6: Final answer
    x = 42,630.30

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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.