Home / 51,890.64-71,609.20-30,680.40

Finding the Fourth Proportional to 51,890.64, 71,609.20 and 30,680.40

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Solution

The fourth proportional to 51,890.64, 71,609.20 and 30,680.40 is: 42,339.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,890.64 : 71,609.20 = 30,680.40 : x
  2. Step 2: Convert to fraction form
    51,890.64/71,609.20 = 30,680.40/x
  3. Step 3: Cross multiply
    51,890.64x = 71,609.20 × 30,680.40
  4. Step 4: Simplify right side
    51,890.64x = 2,196,998,899.68
  5. Step 5: Solve for x
    x = 2,196,998,899.68/51,890.64
  6. Step 6: Final answer
    x = 42,339.02

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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.