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Finding the Fourth Proportional to 57,680.10, 86,520.15 and 37,980.90

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Solution

The fourth proportional to 57,680.10, 86,520.15 and 37,980.90 is: 56,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,680.10 : 86,520.15 = 37,980.90 : x
  2. Step 2: Convert to fraction form
    57,680.10/86,520.15 = 37,980.90/x
  3. Step 3: Cross multiply
    57,680.10x = 86,520.15 × 37,980.90
  4. Step 4: Simplify right side
    57,680.10x = 3,286,113,165.14
  5. Step 5: Solve for x
    x = 3,286,113,165.14/57,680.10
  6. Step 6: Final answer
    x = 56,971.35

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Double scale
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Similar ratio
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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.